AustralieFrV1, Istex, Corpus, bibRecord, 002A22

New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology

Identifieur interne : 002A22 ( Istex/Corpus ); précédent : 002A21; suivant : 002A23

New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology

Auteurs : G. Handler ; H. Pikall ; D. O'Donoghue ; D. A. H. Buckley ; G. Vauclair ; M. Chevreton ; O. Giovannini ; S. O. Kepler ; P. R. Goode ; J. L. Provencal ; M. A. Wood ; J. C. Clemens ; M. S. O'Brien ; R. E. Nather ; D. E. Winget ; S. J. Kleinman ; A. Kanaan ; T. K. Watson ; A. Nitta ; M. H. Montgomery ; E. W. Klumpe ; P. A. Bradley ; D. J. Sullivan ; K. Wu ; T. M. K. Marar ; S. Seetha ; B. N. Ashoka ; H. S. Mahra ; B. C. Bhat ; V. C. Babu ; E. M. Leibowitz ; S. Hemar ; P. A. Ibbetson ; E. Mashal ; E. G. Meistas ; W. A. Dziembowski ; A. A. Pamyatnykh ; P. Moskalik ; S. Zola ; G. Pajdosz ; J. Krzesinski ; J. E. Solheim ; S. Bard ; C. M. Massacand ; M. Breger ; M. J. Gelbmann ; E. Paunzen ; P. North

Source :

Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 1997-04-01.

RBID : ISTEX:E19585AA240C781FE2041C232BD1D1071B3ABAC9

Abstract

92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain.

Url:

https://api.istex.fr/document/E19585AA240C781FE2041C232BD1D1071B3ABAC9/fulltext/pdf

DOI: 10.1093/mnras/286.2.303

Links to Exploration step

ISTEX:E19585AA240C781FE2041C232BD1D1071B3ABAC9

Le document en format XML

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<author><name sortKey="Nitta, A" sort="Nitta, A" uniqKey="Nitta A" first="A." last="Nitta">A. Nitta</name>
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<author><name sortKey="Bradley, P A" sort="Bradley, P A" uniqKey="Bradley P" first="P. A." last="Bradley">P. A. Bradley</name>
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<author><name sortKey="Sullivan, D J" sort="Sullivan, D J" uniqKey="Sullivan D" first="D. J." last="Sullivan">D. J. Sullivan</name>
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<author><name sortKey="Wu, K" sort="Wu, K" uniqKey="Wu K" first="K." last="Wu">K. Wu</name>
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<author><name sortKey="Mahra, H S" sort="Mahra, H S" uniqKey="Mahra H" first="H. S." last="Mahra">H. S. Mahra</name>
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<author><name sortKey="Babu, V C" sort="Babu, V C" uniqKey="Babu V" first="V. C." last="Babu">V. C. Babu</name>
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<author><name sortKey="Leibowitz, E M" sort="Leibowitz, E M" uniqKey="Leibowitz E" first="E. M." last="Leibowitz">E. M. Leibowitz</name>
<affiliation><mods:affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</mods:affiliation>
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<author><name sortKey="Hemar, S" sort="Hemar, S" uniqKey="Hemar S" first="S." last="Hemar">S. Hemar</name>
<affiliation><mods:affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</mods:affiliation>
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<author><name sortKey="Ibbetson, P A" sort="Ibbetson, P A" uniqKey="Ibbetson P" first="P. A." last="Ibbetson">P. A. Ibbetson</name>
<affiliation><mods:affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</mods:affiliation>
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<author><name sortKey="Mashal, E" sort="Mashal, E" uniqKey="Mashal E" first="E." last="Mashal">E. Mashal</name>
<affiliation><mods:affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</mods:affiliation>
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<author><name sortKey="Meistas, E G" sort="Meistas, E G" uniqKey="Meistas E" first="E. G." last="Meistas">E. G. Meistas</name>
<affiliation><mods:affiliation>Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania</mods:affiliation>
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<author><name sortKey="Dziembowski, W A" sort="Dziembowski, W A" uniqKey="Dziembowski W" first="W. A." last="Dziembowski">W. A. Dziembowski</name>
<affiliation><mods:affiliation>Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</mods:affiliation>
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<author><name sortKey="Pamyatnykh, A A" sort="Pamyatnykh, A A" uniqKey="Pamyatnykh A" first="A. A." last="Pamyatnykh">A. A. Pamyatnykh</name>
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<affiliation><mods:affiliation>Institute of Astronomy, Pyatnitskaya Street 48, Moscow 109017, Russia</mods:affiliation>
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<author><name sortKey="Moskalik, P" sort="Moskalik, P" uniqKey="Moskalik P" first="P." last="Moskalik">P. Moskalik</name>
<affiliation><mods:affiliation>Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</mods:affiliation>
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<author><name sortKey="Zola, S" sort="Zola, S" uniqKey="Zola S" first="S." last="Zola">S. Zola</name>
<affiliation><mods:affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</mods:affiliation>
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<author><name sortKey="Pajdosz, G" sort="Pajdosz, G" uniqKey="Pajdosz G" first="G." last="Pajdosz">G. Pajdosz</name>
<affiliation><mods:affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</mods:affiliation>
</affiliation>
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<author><name sortKey="Krzesinski, J" sort="Krzesinski, J" uniqKey="Krzesinski J" first="J." last="Krzesinski">J. Krzesinski</name>
<affiliation><mods:affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Solheim, J E" sort="Solheim, J E" uniqKey="Solheim J" first="J. E." last="Solheim">J. E. Solheim</name>
<affiliation><mods:affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Bard, S" sort="Bard, S" uniqKey="Bard S" first="S." last="Bard">S. Bard</name>
<affiliation><mods:affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Massacand, C M" sort="Massacand, C M" uniqKey="Massacand C" first="C. M." last="Massacand">C. M. Massacand</name>
<affiliation><mods:affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Breger, M" sort="Breger, M" uniqKey="Breger M" first="M." last="Breger">M. Breger</name>
<affiliation><mods:affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Gelbmann, M J" sort="Gelbmann, M J" uniqKey="Gelbmann M" first="M. J." last="Gelbmann">M. J. Gelbmann</name>
<affiliation><mods:affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Paunzen, E" sort="Paunzen, E" uniqKey="Paunzen E" first="E." last="Paunzen">E. Paunzen</name>
<affiliation><mods:affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="North, P" sort="North, P" uniqKey="North P" first="P." last="North">P. North</name>
<affiliation><mods:affiliation>Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-des-Bois, Switzerland</mods:affiliation>
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<sourceDesc><biblStruct><analytic><title level="a">New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology</title>
<author><name sortKey="Handler, G" sort="Handler, G" uniqKey="Handler G" first="G." last="Handler">G. Handler</name>
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<author><name sortKey="Pikall, H" sort="Pikall, H" uniqKey="Pikall H" first="H." last="Pikall">H. Pikall</name>
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<author><name sortKey="O Donoghue, D" sort="O Donoghue, D" uniqKey="O Donoghue D" first="D." last="O'Donoghue">D. O'Donoghue</name>
<affiliation><mods:affiliation>Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa</mods:affiliation>
</affiliation>
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<author><name sortKey="Buckley, D A H" sort="Buckley, D A H" uniqKey="Buckley D" first="D. A. H." last="Buckley">D. A. H. Buckley</name>
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</affiliation>
</author>
<author><name sortKey="Vauclair, G" sort="Vauclair, G" uniqKey="Vauclair G" first="G." last="Vauclair">G. Vauclair</name>
<affiliation><mods:affiliation>Observatoire Midi-Pyrenees, 14 Avenue E. Belin, 31400 Toulouse, France</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Chevreton, M" sort="Chevreton, M" uniqKey="Chevreton M" first="M." last="Chevreton">M. Chevreton</name>
<affiliation><mods:affiliation>Observatoire de Paris-Meudon, F-92195 Meudon, Principal Cedex, France</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Giovannini, O" sort="Giovannini, O" uniqKey="Giovannini O" first="O." last="Giovannini">O. Giovannini</name>
<affiliation><mods:affiliation>Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Kepler, S O" sort="Kepler, S O" uniqKey="Kepler S" first="S. O." last="Kepler">S. O. Kepler</name>
<affiliation><mods:affiliation>Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Goode, P R" sort="Goode, P R" uniqKey="Goode P" first="P. R." last="Goode">P. R. Goode</name>
<affiliation><mods:affiliation>Department of Physics, New Jersey Institute of Technology, Newark NJ 07102, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Provencal, J L" sort="Provencal, J L" uniqKey="Provencal J" first="J. L." last="Provencal">J. L. Provencal</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Wood, M A" sort="Wood, M A" uniqKey="Wood M" first="M. A." last="Wood">M. A. Wood</name>
<affiliation><mods:affiliation>Department of Physics and Space Sciences, Florida Institute of Technology, 150 W. University Blvd. Melbourne, FL 32901, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Clemens, J C" sort="Clemens, J C" uniqKey="Clemens J" first="J. C." last="Clemens">J. C. Clemens</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="O Brien, M S" sort="O Brien, M S" uniqKey="O Brien M" first="M. S." last="O'Brien">M. S. O'Brien</name>
<affiliation><mods:affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Nather, R E" sort="Nather, R E" uniqKey="Nather R" first="R. E." last="Nather">R. E. Nather</name>
<affiliation><mods:affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Winget, D E" sort="Winget, D E" uniqKey="Winget D" first="D. E." last="Winget">D. E. Winget</name>
<affiliation><mods:affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Kleinman, S J" sort="Kleinman, S J" uniqKey="Kleinman S" first="S. J." last="Kleinman">S. J. Kleinman</name>
<affiliation><mods:affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Kanaan, A" sort="Kanaan, A" uniqKey="Kanaan A" first="A." last="Kanaan">A. Kanaan</name>
<affiliation><mods:affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</mods:affiliation>
</affiliation>
</author>
<author><name sortKey="Watson, T K" sort="Watson, T K" uniqKey="Watson T" first="T. K." last="Watson">T. K. Watson</name>
<affiliation><mods:affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</mods:affiliation>
</affiliation>
<affiliation><mods:affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</mods:affiliation>
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<front><div type="abstract">92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain.</div>
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<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
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<author xml:id="author-0001"><persName><forename type="first">H.</forename>
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<author xml:id="author-0002"><persName><forename type="first">D.</forename>
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<author xml:id="author-0003"><persName><forename type="first">D. A. H.</forename>
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<author xml:id="author-0004"><persName><forename type="first">G.</forename>
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<affiliation>Observatoire Midi-Pyrenees, 14 Avenue E. Belin, 31400 Toulouse, France</affiliation>
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<author xml:id="author-0005"><persName><forename type="first">M.</forename>
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<affiliation>Observatoire de Paris-Meudon, F-92195 Meudon, Principal Cedex, France</affiliation>
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<affiliation>⋆ Guest observer, Laboratorio Nacional de Astrofisica/CNPq, Brazil.</affiliation>
<affiliation>Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</affiliation>
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<author xml:id="author-0007"><persName><forename type="first">S. O.</forename>
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<author xml:id="author-0008"><persName><forename type="first">P. R.</forename>
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<affiliation>Department of Physics, New Jersey Institute of Technology, Newark NJ 07102, USA</affiliation>
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<author xml:id="author-0009"><persName><forename type="first">J. L.</forename>
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<author xml:id="author-0010"><persName><forename type="first">M. A.</forename>
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<note type="biography">Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</note>
<affiliation>Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</affiliation>
<affiliation>Department of Physics and Space Sciences, Florida Institute of Technology, 150 W. University Blvd. Melbourne, FL 32901, USA</affiliation>
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<author xml:id="author-0011"><persName><forename type="first">J. C.</forename>
<surname>Clemens</surname>
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<note type="biography">Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</note>
<affiliation>Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</affiliation>
<affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</affiliation>
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<author xml:id="author-0012"><persName><forename type="first">M. S.</forename>
<surname>O'Brien</surname>
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<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
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<author xml:id="author-0013"><persName><forename type="first">R. E.</forename>
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<author xml:id="author-0014"><persName><forename type="first">D. E.</forename>
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<author xml:id="author-0015"><persName><forename type="first">S. J.</forename>
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<note type="biography">§ Guest observer, Mount Stromlo and Siding Spring Observatory, NSW, Australia.</note>
<affiliation>§ Guest observer, Mount Stromlo and Siding Spring Observatory, NSW, Australia.</affiliation>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
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<author xml:id="author-0016"><persName><forename type="first">A.</forename>
<surname>Kanaan</surname>
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<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
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<author xml:id="author-0017"><persName><forename type="first">T. K.</forename>
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<affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</affiliation>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
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<author xml:id="author-0018"><persName><forename type="first">A.</forename>
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<author xml:id="author-0019"><persName><forename type="first">M. H.</forename>
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<author xml:id="author-0020"><persName><forename type="first">E. W.</forename>
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<author xml:id="author-0021"><persName><forename type="first">P. A.</forename>
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<affiliation>Los Alamos National Laboratory, XTA, MS B220, Los Alamos, NM 87545, USA</affiliation>
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<author xml:id="author-0022"><persName><forename type="first">D. J.</forename>
<surname>Sullivan</surname>
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<affiliation>Physics Department, Victoria University of Wellington, PO Box 600, Wellington, New Zealand</affiliation>
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<author xml:id="author-0023"><persName><forename type="first">K.</forename>
<surname>Wu</surname>
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<author xml:id="author-0024"><persName><forename type="first">T. M. K.</forename>
<surname>Marar</surname>
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<affiliation>Indian Space Research Organization, Technical Physics Division, ISRO Satellite Centre, Airport Road, Bangalore 560017, India</affiliation>
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<author xml:id="author-0026"><persName><forename type="first">B. N.</forename>
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<author xml:id="author-0028"><persName><forename type="first">B. C.</forename>
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<author xml:id="author-0029"><persName><forename type="first">V. C.</forename>
<surname>Babu</surname>
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<author xml:id="author-0030"><persName><forename type="first">E. M.</forename>
<surname>Leibowitz</surname>
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<affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</affiliation>
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<author xml:id="author-0034"><persName><forename type="first">E. G.</forename>
<surname>Meistas</surname>
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<affiliation>Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania</affiliation>
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<author xml:id="author-0035"><persName><forename type="first">W. A.</forename>
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<author xml:id="author-0038"><persName><forename type="first">S.</forename>
<surname>Zola</surname>
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<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
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<author xml:id="author-0039"><persName><forename type="first">G.</forename>
<surname>Pajdosz</surname>
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<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
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<author xml:id="author-0040"><persName><forename type="first">J.</forename>
<surname>Krzesinski</surname>
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<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
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<author xml:id="author-0041"><persName><forename type="first">J. E.</forename>
<surname>Solheim</surname>
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<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
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<author xml:id="author-0042"><persName><forename type="first">S.</forename>
<surname>Bard</surname>
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<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
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<author xml:id="author-0043"><persName><forename type="first">C. M.</forename>
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<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
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<author xml:id="author-0044"><persName><forename type="first">M.</forename>
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<author xml:id="author-0045"><persName><forename type="first">M. J.</forename>
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<author xml:id="author-0046"><persName><forename type="first">E.</forename>
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<abstract><p>92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain.</p>
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<front>

<journal-meta>

<journal-id journal-id-type="hwp">mnras</journal-id>

<journal-id journal-id-type="publisher-id">mnras</journal-id>

<journal-title>Monthly Notices of the Royal Astronomical Society</journal-title>

<abbrev-journal-title>Mon. Not. R. Astron. Soc.</abbrev-journal-title>

<issn pub-type="ppub">0035-8711</issn>

<issn pub-type="epub">1365-2966</issn>

<publisher>

<publisher-name>Blackwell Science Ltd</publisher-name>

<publisher-loc>Oxford, UK</publisher-loc>

</publisher>

</journal-meta>

<article-meta>

<article-id pub-id-type="doi">10.1093/mnras/286.2.303</article-id>

<article-categories>

<subj-group subj-group-type="heading">

<subject>Papers</subject>

</subj-group>

</article-categories>

<title-group>

<article-title>New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology</article-title>

</title-group>

<contrib-group>

<contrib contrib-type="author">

<name><surname>Handler</surname>
<given-names>G.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>1</sup>
</xref>
<xref rid="fn1" ref-type="fn">⋆</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Pikall</surname>
<given-names>H.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>1</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>O'Donoghue</surname>
<given-names>D.</given-names>
</name>
<xref rid="aff2" ref-type="aff"><sup>2</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Buckley</surname>
<given-names>D. A. H.</given-names>
</name>
<xref rid="aff3" ref-type="aff"><sup>3</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Vauclair</surname>
<given-names>G.</given-names>
</name>
<xref rid="aff4" ref-type="aff"><sup>4</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Chevreton</surname>
<given-names>M.</given-names>
</name>
<xref rid="aff5" ref-type="aff"><sup>5</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Giovannini</surname>
<given-names>O.</given-names>
</name>
<xref rid="aff6" ref-type="aff"><sup>6</sup>
</xref>
<xref rid="fn2" ref-type="fn">†</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Kepler</surname>
<given-names>S. O.</given-names>
</name>
<xref rid="aff6" ref-type="aff"><sup>6</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Goode</surname>
<given-names>P. R.</given-names>
</name>
<xref rid="aff7" ref-type="aff"><sup>7</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Provencal</surname>
<given-names>J. L.</given-names>
</name>
<xref rid="aff8" ref-type="aff"><sup>8</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Wood</surname>
<given-names>M. A.</given-names>
</name>
<xref rid="aff9" ref-type="aff"><sup>9</sup>
</xref>
<xref rid="fn3" ref-type="fn">‡</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Clemens</surname>
<given-names>J. C.</given-names>
</name>
<xref rid="aff10" ref-type="aff"><sup>10</sup>
</xref>
<xref rid="fn3" ref-type="fn">‡</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>O'Brien</surname>
<given-names>M. S.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>10</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Nather</surname>
<given-names>R. E.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Winget</surname>
<given-names>D. E.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Kleinman</surname>
<given-names>S. J.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>
<xref rid="fn4" ref-type="fn">§</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Kanaan</surname>
<given-names>A.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Watson</surname>
<given-names>T. K.</given-names>
</name>
<xref rid="aff10" ref-type="aff"><sup>10</sup>
</xref>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Nitta</surname>
<given-names>A.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Montgomery</surname>
<given-names>M. H.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Klumpe</surname>
<given-names>E. W.</given-names>
</name>
<xref rid="aff11" ref-type="aff"><sup>11</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Bradley</surname>
<given-names>P. A.</given-names>
</name>
<xref rid="aff12" ref-type="aff"><sup>12</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Sullivan</surname>
<given-names>D. J.</given-names>
</name>
<xref rid="aff13" ref-type="aff"><sup>13</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Wu</surname>
<given-names>K.</given-names>
</name>
<xref rid="aff14" ref-type="aff"><sup>14</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Marar</surname>
<given-names>T. M. K.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Seetha</surname>
<given-names>S.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Ashoka</surname>
<given-names>B. N.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Mahra</surname>
<given-names>H. S.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Bhat</surname>
<given-names>B. C.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Babu</surname>
<given-names>V. C.</given-names>
</name>
<xref rid="aff15" ref-type="aff"><sup>15</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Leibowitz</surname>
<given-names>E. M.</given-names>
</name>
<xref rid="aff16" ref-type="aff"><sup>16</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Hemar</surname>
<given-names>S.</given-names>
</name>
<xref rid="aff16" ref-type="aff"><sup>16</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Ibbetson</surname>
<given-names>P. A.</given-names>
</name>
<xref rid="aff16" ref-type="aff"><sup>16</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Mashal</surname>
<given-names>E.</given-names>
</name>
<xref rid="aff16" ref-type="aff"><sup>16</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Meistas</surname>
<given-names>E. G.</given-names>
</name>
<xref rid="aff17" ref-type="aff"><sup>17</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Dziembowski</surname>
<given-names>W. A.</given-names>
</name>
<xref rid="aff18" ref-type="aff"><sup>18</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Pamyatnykh</surname>
<given-names>A. A.</given-names>
</name>
<xref rid="aff18" ref-type="aff"><sup>18</sup>
</xref>
<xref rid="aff19" ref-type="aff"><sup>19</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Moskalik</surname>
<given-names>P.</given-names>
</name>
<xref rid="aff18" ref-type="aff"><sup>18</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Zola</surname>
<given-names>S.</given-names>
</name>
<xref rid="aff20" ref-type="aff"><sup>20</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Pajdosz</surname>
<given-names>G.</given-names>
</name>
<xref rid="aff20" ref-type="aff"><sup>20</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Krzesinski</surname>
<given-names>J.</given-names>
</name>
<xref rid="aff20" ref-type="aff"><sup>20</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Solheim</surname>
<given-names>J. E.</given-names>
</name>
<xref rid="aff21" ref-type="aff"><sup>21</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Bard</surname>
<given-names>S.</given-names>
</name>
<xref rid="aff21" ref-type="aff"><sup>21</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Massacand</surname>
<given-names>C. M.</given-names>
</name>
<xref rid="aff21" ref-type="aff"><sup>21</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Breger</surname>
<given-names>M.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>1</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Gelbmann</surname>
<given-names>M. J.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>1</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>Paunzen</surname>
<given-names>E.</given-names>
</name>
<xref rid="aff1" ref-type="aff"><sup>1</sup>
</xref>

</contrib>

<contrib contrib-type="author">

<name><surname>North</surname>
<given-names>P.</given-names>
</name>
<xref rid="aff22" ref-type="aff"><sup>22</sup>
</xref>

</contrib>

<aff id="aff1"><label>1</label>
Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</aff>

<aff id="aff2"><label>2</label>
Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa</aff>

<aff id="aff3"><label>3</label>
South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa</aff>

<aff id="aff4"><label>4</label>
Observatoire Midi-Pyrenees, 14 Avenue E. Belin, 31400 Toulouse, France</aff>

<aff id="aff5"><label>5</label>
Observatoire de Paris-Meudon, F-92195 Meudon, Principal Cedex, France</aff>

<aff id="aff6"><label>6</label>
Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</aff>

<aff id="aff7"><label>7</label>
Department of Physics, New Jersey Institute of Technology, Newark NJ 07102, USA</aff>

<aff id="aff8"><label>8</label>
Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA</aff>

<aff id="aff9"><label>9</label>
Department of Physics and Space Sciences, Florida Institute of Technology, 150 W. University Blvd. Melbourne, FL 32901, USA</aff>

<aff id="aff10"><label>10</label>
Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</aff>

<aff id="aff11"><label>11</label>
Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</aff>

<aff id="aff12"><label>12</label>
Los Alamos National Laboratory, XTA, MS B220, Los Alamos, NM 87545, USA</aff>

<aff id="aff13"><label>13</label>
Physics Department, Victoria University of Wellington, PO Box 600, Wellington, New Zealand</aff>

<aff id="aff14"><label>14</label>
Department of Mathematics, Australian National University, Canberra, Australia</aff>

<aff id="aff15"><label>15</label>
Indian Space Research Organization, Technical Physics Division, ISRO Satellite Centre, Airport Road, Bangalore 560017, India</aff>

<aff id="aff16"><label>16</label>
Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</aff>

<aff id="aff17"><label>17</label>
Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania</aff>

<aff id="aff18"><label>18</label>
Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</aff>

<aff id="aff19"><label>19</label>
Institute of Astronomy, Pyatnitskaya Street 48, Moscow 109017, Russia</aff>

<aff id="aff20"><label>20</label>
Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</aff>

<aff id="aff21"><label>21</label>
Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</aff>

<aff id="aff22"><label>22</label>
Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-des-Bois, Switzerland</aff>

</contrib-group>

<author-notes>

<fn id="fn1" fn-type="other">

<label>⋆</label>

<p>E-mail: <email>gerald@procyon.ast.univie.ac.at</email>
</p>

</fn>

<fn id="fn2" fn-type="other">

<label>⋆</label>

<p>Guest observer, Laboratorio Nacional de Astrofisica/CNPq, Brazil.</p>

</fn>

<fn id="fn3" fn-type="other">

<label>†</label>

<p>Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</p>

</fn>

<fn id="fn4" fn-type="other">

<label>§</label>

<p>Guest observer, Mount Stromlo and Siding Spring Observatory, NSW, Australia.</p>

</fn>

</author-notes>

<pub-date pub-type="ppub">

<day>1</day>

<month>4</month>

<year>1997</year>

</pub-date>

<volume>286</volume>

<issue>2</issue>

<fpage>303</fpage>

<lpage>314</lpage>

<history>

<date date-type="received">

<day>27</day>

<month>9</month>

<year>1996</year>

</date>

<date date-type="accepted">

<day>5</day>

<month>10</month>

<year>1996</year>

</date>

</history>

<permissions>

<copyright-statement>© 1997 RAS</copyright-statement>

<copyright-year>1997</copyright-year>

</permissions>

<abstract>

<p>92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain.</p>

</abstract>

</article-meta>

</front>

</article>
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<mods version="3.6"><titleInfo><title>New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology</title>
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<titleInfo type="alternative" contentType="CDATA"><title>New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology</title>
</titleInfo>
<name type="personal"><namePart type="given">G.</namePart>
<namePart type="family">Handler</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<description>E-mail: gerald@procyon.ast.univie.ac.at</description>
<description>⋆ E-mail: gerald@procyon.ast.univie.ac.at</description>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">H.</namePart>
<namePart type="family">Pikall</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D.</namePart>
<namePart type="family">O'Donoghue</namePart>
<affiliation>Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D. A. H.</namePart>
<namePart type="family">Buckley</namePart>
<affiliation>South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">G.</namePart>
<namePart type="family">Vauclair</namePart>
<affiliation>Observatoire Midi-Pyrenees, 14 Avenue E. Belin, 31400 Toulouse, France</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M.</namePart>
<namePart type="family">Chevreton</namePart>
<affiliation>Observatoire de Paris-Meudon, F-92195 Meudon, Principal Cedex, France</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">O.</namePart>
<namePart type="family">Giovannini</namePart>
<affiliation>Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</affiliation>
<description>⋆ Guest observer, Laboratorio Nacional de Astrofisica/CNPq, Brazil.</description>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S. O.</namePart>
<namePart type="family">Kepler</namePart>
<affiliation>Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre-RS, Brazil</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">P. R.</namePart>
<namePart type="family">Goode</namePart>
<affiliation>Department of Physics, New Jersey Institute of Technology, Newark NJ 07102, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J. L.</namePart>
<namePart type="family">Provencal</namePart>
<affiliation>Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. A.</namePart>
<namePart type="family">Wood</namePart>
<affiliation>Department of Physics and Space Sciences, Florida Institute of Technology, 150 W. University Blvd. Melbourne, FL 32901, USA</affiliation>
<description>Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</description>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J. C.</namePart>
<namePart type="family">Clemens</namePart>
<affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</affiliation>
<description>Guest observer, Institute for Astronomy, Honolulu, Hawaii, USA.</description>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. S.</namePart>
<namePart type="family">O'Brien</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">R. E.</namePart>
<namePart type="family">Nather</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">D. E.</namePart>
<namePart type="family">Winget</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S. J.</namePart>
<namePart type="family">Kleinman</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<description>§ Guest observer, Mount Stromlo and Siding Spring Observatory, NSW, Australia.</description>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Kanaan</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">T. K.</namePart>
<namePart type="family">Watson</namePart>
<affiliation>Department of Physics and Astronomy, Iowa State University, Ames, IA 50211, USA</affiliation>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">A.</namePart>
<namePart type="family">Nitta</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. H.</namePart>
<namePart type="family">Montgomery</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E. W.</namePart>
<namePart type="family">Klumpe</namePart>
<affiliation>Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712, USA</affiliation>
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<name type="personal"><namePart type="given">P. A.</namePart>
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<affiliation>Los Alamos National Laboratory, XTA, MS B220, Los Alamos, NM 87545, USA</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">D. J.</namePart>
<namePart type="family">Sullivan</namePart>
<affiliation>Physics Department, Victoria University of Wellington, PO Box 600, Wellington, New Zealand</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">K.</namePart>
<namePart type="family">Wu</namePart>
<affiliation>Department of Mathematics, Australian National University, Canberra, Australia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">T. M. K.</namePart>
<namePart type="family">Marar</namePart>
<affiliation>Indian Space Research Organization, Technical Physics Division, ISRO Satellite Centre, Airport Road, Bangalore 560017, India</affiliation>
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</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Seetha</namePart>
<affiliation>Indian Space Research Organization, Technical Physics Division, ISRO Satellite Centre, Airport Road, Bangalore 560017, India</affiliation>
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</role>
</name>
<name type="personal"><namePart type="given">B. N.</namePart>
<namePart type="family">Ashoka</namePart>
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<name type="personal"><namePart type="given">H. S.</namePart>
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<name type="personal"><namePart type="given">B. C.</namePart>
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</role>
</name>
<name type="personal"><namePart type="given">V. C.</namePart>
<namePart type="family">Babu</namePart>
<affiliation>Indian Space Research Organization, Technical Physics Division, ISRO Satellite Centre, Airport Road, Bangalore 560017, India</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E. M.</namePart>
<namePart type="family">Leibowitz</namePart>
<affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Hemar</namePart>
<affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">P. A.</namePart>
<namePart type="family">Ibbetson</namePart>
<affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</affiliation>
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<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">Mashal</namePart>
<affiliation>Wise Observatory, Sadder Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel</affiliation>
<role><roleTerm type="text">author</roleTerm>
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<name type="personal"><namePart type="given">E. G.</namePart>
<namePart type="family">Meistas</namePart>
<affiliation>Institute of Theoretical Physics and Astronomy, Gostauto 12, Vilnius 2600, Lithuania</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">W. A.</namePart>
<namePart type="family">Dziembowski</namePart>
<affiliation>Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</affiliation>
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<name type="personal"><namePart type="given">A. A.</namePart>
<namePart type="family">Pamyatnykh</namePart>
<affiliation>Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</affiliation>
<affiliation>Institute of Astronomy, Pyatnitskaya Street 48, Moscow 109017, Russia</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">Moskalik</namePart>
<affiliation>Copernicus Astronomical Center, ul. Bartycka 18, 00–716 Warsaw, Poland</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Zola</namePart>
<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">G.</namePart>
<namePart type="family">Pajdosz</namePart>
<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J.</namePart>
<namePart type="family">Krzesinski</namePart>
<affiliation>Mount Suhora Observatory, Krakow Pedagogical University, ul. Podchorăiych 2, 30-084 Cracow, Poland</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">J. E.</namePart>
<namePart type="family">Solheim</namePart>
<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">Bard</namePart>
<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">C. M.</namePart>
<namePart type="family">Massacand</namePart>
<affiliation>Institua for Matematiske Realfag, Nordlysobservatoriet, Universitet i Tromsø, 9000 Tromsø, Norway</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M.</namePart>
<namePart type="family">Breger</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">M. J.</namePart>
<namePart type="family">Gelbmann</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">Paunzen</namePart>
<affiliation>Institut für Astronomie, Universität Wien, Türkenschanzstraβe 17, A-1180 Wien, Austria</affiliation>
<role><roleTerm type="text">author</roleTerm>
</role>
</name>
<name type="personal"><namePart type="given">P.</namePart>
<namePart type="family">North</namePart>
<affiliation>Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-des-Bois, Switzerland</affiliation>
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<originInfo><publisher>Blackwell Science Ltd</publisher>
<place><placeTerm type="text">Oxford, UK</placeTerm>
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<dateIssued encoding="w3cdtf">1997-04-01</dateIssued>
<copyrightDate encoding="w3cdtf">1997</copyrightDate>
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<abstract>92 h of new Whole Earth Telescope observations have been acquired for the δ Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain.</abstract>
<note type="footnotes">E-mail: gerald@procyon.ast.univie.ac.at</note>
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<identifier type="ISSN">0035-8711</identifier>
<identifier type="eISSN">1365-2966</identifier>
<identifier type="PublisherID">mnras</identifier>
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<part><date>1997</date>
<detail type="volume"><caption>vol.</caption>
<number>286</number>
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<detail type="issue"><caption>no.</caption>
<number>2</number>
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<extent unit="pages"><start>303</start>
<end>314</end>
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<identifier type="DOI">10.1093/mnras/286.2.303</identifier>
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New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology

New Whole Earth Telescope observations of CD-24 7599: steps towards δ Scuti star seismology

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