29 frequencies for the δ Scuti variable BI CMi: the 1997–2000 multisite campaigns
Identifieur interne : 00B449 ( Main/Exploration ); précédent : 00B448; suivant : 00B45029 frequencies for the δ Scuti variable BI CMi: the 1997–2000 multisite campaigns
Auteurs : M. Breger [Autriche] ; R. Garrido [Espagne] ; G. Handler [Autriche, Afrique du Sud] ; M. A. Wood [États-Unis] ; R. R. Shobbrook [Australie] ; K. M. Bischof [Autriche] ; F. Rodler [Autriche] ; R. O. Gray [États-Unis] ; A. Stankov [Autriche] ; P. Martinez [Afrique du Sud] ; D. O'Donoghue [Afrique du Sud] ; R. Szab [Hongrie] ; W. Zima [Autriche] ; A. B. Kaye [États-Unis] ; C. Barban [France, États-Unis] ; U. Heiter [Autriche]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2002-01-21.
English descriptors
- KwdEn :
- Absolute magnitude, Abundance spots, Additional frequencies, Amplitude, Amplitude ratios, Amplitude variability, Appalachian state university, Astronomy observatories, Average residuals, Bias subtraction, Breger, Canuto mazzitelli, Classical instability strip, Colours, Combination frequency, Comparison star, Comparison stars, Cool border, Cool edge, Data point, Data points, Data sets, Delta scuti, Delta scuti network, Deviant points, Different assumptions, Different colours, Different values, Divergent points, Dominant modes, Doradus, Doradus star, Ellipsoidal variations, Excellent frequency resolution, Fourier analyses, Frequency, Frequency pairs, Frequency spectrum, Frequency values, Full weight, Hertzsprung russell diagram, High photometric accuracy, Iiip sreucr, Kitt peak, Light curves, Linear combination, Linear combinations, Lowest residuals, Lter mmag mmag, Lters, Luminosity, Magnitude differences, Main pulsation frequency range, Mantegazza poretti, Mmag, Mnras, Mode table, Moon dworetsky, More frequencies, Multifrequency, Multifrequency solution, Multifrequency solutions, Multisite, Multisite campaign, Multisite photometry, Next section, Observatory, Other frequencies, Other modes, Outstanding property, Phase differences, Photometric, Photometric calibrations, Photometry, Poretti, Power spectra, Power spectrum, Present campaign, Pulsation, Pulsation frequencies, Pulsation models, Pulsation modes, Random errors, Residual, Rodriguez breger, Rotational, Rotational frequency, Rotational velocity, Saao, Scuti, Scuti star, Scuti stars, Second comparison star, Siding spring observatory, Sierra nevada, Simplex method, Small amplitudes, Solar radii, Spectral type, Standard fashion, Stellar, Stellar surface, Successive measurements, Surface gravity, Variability, Weighting scheme, stars: individual: BI CMi, stars: oscillations, stars: rotation, techniques: photometric, δ Scuti.
- Teeft :
- Absolute magnitude, Abundance spots, Additional frequencies, Amplitude, Amplitude ratios, Amplitude variability, Appalachian state university, Astronomy observatories, Average residuals, Bias subtraction, Breger, Canuto mazzitelli, Classical instability strip, Colours, Combination frequency, Comparison star, Comparison stars, Cool border, Cool edge, Data point, Data points, Data sets, Delta scuti, Delta scuti network, Deviant points, Different assumptions, Different colours, Different values, Divergent points, Dominant modes, Doradus, Doradus star, Ellipsoidal variations, Excellent frequency resolution, Fourier analyses, Frequency, Frequency pairs, Frequency spectrum, Frequency values, Full weight, Hertzsprung russell diagram, High photometric accuracy, Iiip sreucr, Kitt peak, Light curves, Linear combination, Linear combinations, Lowest residuals, Lter mmag mmag, Lters, Luminosity, Magnitude differences, Main pulsation frequency range, Mantegazza poretti, Mmag, Mnras, Mode table, Moon dworetsky, More frequencies, Multifrequency, Multifrequency solution, Multifrequency solutions, Multisite, Multisite campaign, Multisite photometry, Next section, Observatory, Other frequencies, Other modes, Outstanding property, Phase differences, Photometric, Photometric calibrations, Photometry, Poretti, Power spectra, Power spectrum, Present campaign, Pulsation, Pulsation frequencies, Pulsation models, Pulsation modes, Random errors, Residual, Rodriguez breger, Rotational, Rotational frequency, Rotational velocity, Saao, Scuti, Scuti star, Scuti stars, Second comparison star, Siding spring observatory, Sierra nevada, Simplex method, Small amplitudes, Solar radii, Spectral type, Standard fashion, Stellar, Stellar surface, Successive measurements, Surface gravity, Variability, Weighting scheme.
Abstract
A multisite campaign of BI CMi was carried out with excellent frequency resolution and high photometric accuracy from 1997 to 2000, including two long observing seasons. 29 pulsation frequencies could be extracted from the 1024 h (177 nights) of photometry used. The detected frequencies include 20 pulsation modes in the main pulsation frequency range from 4.8 to 13.0 cycle d−1 (55 to 150 μHz), eight linear combinations of these frequencies, and a very low frequency at 1.66 cycle d−1. Since the value of the low frequency at 1.66 cycle d−1 cannot be identified with a linear combination of other frequencies, g-mode pulsation is suspected, but rotational modulation of abundance spots cannot be ruled out. BI CMi, which is situated near the cool edge of the classical instability strip, may be both a δ Scuti and a γ Doradus star. Another outstanding property of BI CMi is the presence of a number of close frequency pairs in the power spectrum with separations as small as 0.01 cycle d−1. A rotational velocity of was determined from a high-dispersion spectrum. From phase differences, the dominant modes can be identified with ℓ values from 0 to 2. The spectral type and evolutionary status of BI CMi are examined.
Url:
DOI: 10.1046/j.1365-8711.2002.04970.x
Affiliations:
- Afrique du Sud, Australie, Autriche, Espagne, France, Hongrie, États-Unis
- Arizona, Caroline du Nord, Floride, Nouveau-Mexique, Nouvelle-Galles du Sud
- Sydney
- Université de Sydney
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Breger</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Autriche</country></affiliation><affiliation><wicri:noCountry code="syntax">???</wicri:noCountry></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Autriche</country></affiliation></author><author><name sortKey="Garrido, R" sort="Garrido, R" uniqKey="Garrido R" first="R." last="Garrido">R. Garrido</name><affiliation wicri:level="1"><country xml:lang="fr">Espagne</country><wicri:regionArea>Instituto de Astrofisica de Andalucia, CSIC, Apdo. 3004, E-18080 Granada</wicri:regionArea><wicri:noRegion>E-18080 Granada</wicri:noRegion></affiliation></author><author><name sortKey="Handler, G" sort="Handler, G" uniqKey="Handler G" first="G." last="Handler">G. Handler</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>SAAO, PO Box 9, Observatory 7935, Cape Town</wicri:regionArea><wicri:noRegion>Cape Town</wicri:noRegion></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 wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Physics and Space Sciences & SARA Observatory, Florida Institute of Technology, Melbourne, FL 32901</wicri:regionArea><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Shobbrook, R R" sort="Shobbrook, R R" uniqKey="Shobbrook R" first="R. R." last="Shobbrook">R. R. Shobbrook</name><affiliation wicri:level="4"><country xml:lang="fr">Australie</country><wicri:regionArea>Department of Physics, University of Sydney</wicri:regionArea><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author><author><name sortKey="Bischof, K M" sort="Bischof, K M" uniqKey="Bischof K" first="K. M." last="Bischof">K. M. Bischof</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation></author><author><name sortKey="Rodler, F" sort="Rodler, F" uniqKey="Rodler F" first="F." last="Rodler">F. 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Stankov</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation></author><author><name sortKey="Martinez, P" sort="Martinez, P" uniqKey="Martinez P" first="P." last="Martinez">P. Martinez</name><affiliation wicri:level="1"><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>SAAO, PO Box 9, Observatory 7935, Cape Town</wicri:regionArea><wicri:noRegion>Cape Town</wicri:noRegion></affiliation></author><author><name sortKey="O Donoghue, D" sort="O Donoghue, D" uniqKey="O Donoghue D" first="D." last="O'Donoghue">D. O'Donoghue</name><affiliation wicri:level="1"><country xml:lang="fr">Afrique du Sud</country><wicri:regionArea>SAAO, PO Box 9, Observatory 7935, Cape Town</wicri:regionArea><wicri:noRegion>Cape Town</wicri:noRegion></affiliation></author><author><name sortKey="Szab, R" sort="Szab, R" uniqKey="Szab R" first="R." last="Szab">R. Szab</name><affiliation wicri:level="1"><country xml:lang="fr">Hongrie</country><wicri:regionArea>Konkoly Observatory, PO Box 67, H-1525 Budapest XII</wicri:regionArea><wicri:noRegion>H-1525 Budapest XII</wicri:noRegion></affiliation></author><author><name sortKey="Zima, W" sort="Zima, W" uniqKey="Zima W" first="W." last="Zima">W. Zima</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation></author><author><name sortKey="Kaye, A B" sort="Kaye, A B" uniqKey="Kaye A" first="A. B." last="Kaye">A. B. Kaye</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Applied Physics Division, X-5, Los Alamos National Laboratory, Mail Stop F-663, Los Alamos, NM 87545</wicri:regionArea><placeName><region type="state">Nouveau-Mexique</region></placeName></affiliation></author><author><name sortKey="Barban, C" sort="Barban, C" uniqKey="Barban C" first="C." last="Barban">C. Barban</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Observatoire de Paris, DASGAL, UMR 8633, 92105 Meudon</wicri:regionArea><wicri:noRegion>92105 Meudon</wicri:noRegion><wicri:noRegion>92105 Meudon</wicri:noRegion></affiliation><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>National Solar Observatory, 950 N. Cherry, Tucson, AZ 85719</wicri:regionArea><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Heiter, U" sort="Heiter, U" uniqKey="Heiter U" first="U." last="Heiter">U. Heiter</name><affiliation wicri:level="1"><country xml:lang="fr">Autriche</country><wicri:regionArea>Astronomisches Institut der Universität Wien, Türkenschanzstr. 17, A–1180 Wien</wicri:regionArea><wicri:noRegion>A–1180 Wien</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="abbrev">Mon. Not. R. Astron. Soc.</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><publisher>Blackwell Science Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2002-01-21">2002-01-21</date><biblScope unit="volume">329</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="531">531</biblScope><biblScope unit="page" to="542">542</biblScope></imprint><idno type="ISSN">0035-8711</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absolute magnitude</term><term>Abundance spots</term><term>Additional frequencies</term><term>Amplitude</term><term>Amplitude ratios</term><term>Amplitude variability</term><term>Appalachian state university</term><term>Astronomy observatories</term><term>Average residuals</term><term>Bias subtraction</term><term>Breger</term><term>Canuto mazzitelli</term><term>Classical instability strip</term><term>Colours</term><term>Combination frequency</term><term>Comparison star</term><term>Comparison stars</term><term>Cool border</term><term>Cool edge</term><term>Data point</term><term>Data points</term><term>Data sets</term><term>Delta scuti</term><term>Delta scuti network</term><term>Deviant points</term><term>Different assumptions</term><term>Different colours</term><term>Different values</term><term>Divergent points</term><term>Dominant modes</term><term>Doradus</term><term>Doradus star</term><term>Ellipsoidal variations</term><term>Excellent frequency resolution</term><term>Fourier analyses</term><term>Frequency</term><term>Frequency pairs</term><term>Frequency spectrum</term><term>Frequency values</term><term>Full weight</term><term>Hertzsprung russell diagram</term><term>High photometric accuracy</term><term>Iiip sreucr</term><term>Kitt peak</term><term>Light curves</term><term>Linear combination</term><term>Linear combinations</term><term>Lowest residuals</term><term>Lter mmag mmag</term><term>Lters</term><term>Luminosity</term><term>Magnitude differences</term><term>Main pulsation frequency range</term><term>Mantegazza poretti</term><term>Mmag</term><term>Mnras</term><term>Mode table</term><term>Moon dworetsky</term><term>More frequencies</term><term>Multifrequency</term><term>Multifrequency solution</term><term>Multifrequency solutions</term><term>Multisite</term><term>Multisite campaign</term><term>Multisite photometry</term><term>Next section</term><term>Observatory</term><term>Other frequencies</term><term>Other modes</term><term>Outstanding property</term><term>Phase differences</term><term>Photometric</term><term>Photometric calibrations</term><term>Photometry</term><term>Poretti</term><term>Power spectra</term><term>Power spectrum</term><term>Present campaign</term><term>Pulsation</term><term>Pulsation frequencies</term><term>Pulsation models</term><term>Pulsation modes</term><term>Random errors</term><term>Residual</term><term>Rodriguez breger</term><term>Rotational</term><term>Rotational frequency</term><term>Rotational velocity</term><term>Saao</term><term>Scuti</term><term>Scuti star</term><term>Scuti stars</term><term>Second comparison star</term><term>Siding spring observatory</term><term>Sierra nevada</term><term>Simplex method</term><term>Small amplitudes</term><term>Solar radii</term><term>Spectral type</term><term>Standard fashion</term><term>Stellar</term><term>Stellar surface</term><term>Successive measurements</term><term>Surface gravity</term><term>Variability</term><term>Weighting scheme</term><term>stars: individual: BI CMi</term><term>stars: oscillations</term><term>stars: rotation</term><term>techniques: photometric</term><term>δ Scuti</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Absolute magnitude</term><term>Abundance spots</term><term>Additional frequencies</term><term>Amplitude</term><term>Amplitude ratios</term><term>Amplitude variability</term><term>Appalachian state university</term><term>Astronomy observatories</term><term>Average residuals</term><term>Bias subtraction</term><term>Breger</term><term>Canuto mazzitelli</term><term>Classical instability strip</term><term>Colours</term><term>Combination frequency</term><term>Comparison star</term><term>Comparison stars</term><term>Cool border</term><term>Cool edge</term><term>Data point</term><term>Data points</term><term>Data sets</term><term>Delta scuti</term><term>Delta scuti network</term><term>Deviant points</term><term>Different assumptions</term><term>Different colours</term><term>Different values</term><term>Divergent points</term><term>Dominant modes</term><term>Doradus</term><term>Doradus star</term><term>Ellipsoidal variations</term><term>Excellent frequency resolution</term><term>Fourier analyses</term><term>Frequency</term><term>Frequency pairs</term><term>Frequency spectrum</term><term>Frequency values</term><term>Full weight</term><term>Hertzsprung russell diagram</term><term>High photometric accuracy</term><term>Iiip sreucr</term><term>Kitt peak</term><term>Light curves</term><term>Linear combination</term><term>Linear combinations</term><term>Lowest residuals</term><term>Lter mmag mmag</term><term>Lters</term><term>Luminosity</term><term>Magnitude differences</term><term>Main pulsation frequency range</term><term>Mantegazza poretti</term><term>Mmag</term><term>Mnras</term><term>Mode table</term><term>Moon dworetsky</term><term>More frequencies</term><term>Multifrequency</term><term>Multifrequency solution</term><term>Multifrequency solutions</term><term>Multisite</term><term>Multisite campaign</term><term>Multisite photometry</term><term>Next section</term><term>Observatory</term><term>Other frequencies</term><term>Other modes</term><term>Outstanding property</term><term>Phase differences</term><term>Photometric</term><term>Photometric calibrations</term><term>Photometry</term><term>Poretti</term><term>Power spectra</term><term>Power spectrum</term><term>Present campaign</term><term>Pulsation</term><term>Pulsation frequencies</term><term>Pulsation models</term><term>Pulsation modes</term><term>Random errors</term><term>Residual</term><term>Rodriguez breger</term><term>Rotational</term><term>Rotational frequency</term><term>Rotational velocity</term><term>Saao</term><term>Scuti</term><term>Scuti star</term><term>Scuti stars</term><term>Second comparison star</term><term>Siding spring observatory</term><term>Sierra nevada</term><term>Simplex method</term><term>Small amplitudes</term><term>Solar radii</term><term>Spectral type</term><term>Standard fashion</term><term>Stellar</term><term>Stellar surface</term><term>Successive measurements</term><term>Surface gravity</term><term>Variability</term><term>Weighting scheme</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A multisite campaign of BI CMi was carried out with excellent frequency resolution and high photometric accuracy from 1997 to 2000, including two long observing seasons. 29 pulsation frequencies could be extracted from the 1024 h (177 nights) of photometry used. The detected frequencies include 20 pulsation modes in the main pulsation frequency range from 4.8 to 13.0 cycle d−1 (55 to 150 μHz), eight linear combinations of these frequencies, and a very low frequency at 1.66 cycle d−1. Since the value of the low frequency at 1.66 cycle d−1 cannot be identified with a linear combination of other frequencies, g-mode pulsation is suspected, but rotational modulation of abundance spots cannot be ruled out. BI CMi, which is situated near the cool edge of the classical instability strip, may be both a δ Scuti and a γ Doradus star. Another outstanding property of BI CMi is the presence of a number of close frequency pairs in the power spectrum with separations as small as 0.01 cycle d−1. A rotational velocity of was determined from a high-dispersion spectrum. From phase differences, the dominant modes can be identified with ℓ values from 0 to 2. The spectral type and evolutionary status of BI CMi are examined.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li><li>Australie</li><li>Autriche</li><li>Espagne</li><li>France</li><li>Hongrie</li><li>États-Unis</li></country><region><li>Arizona</li><li>Caroline du Nord</li><li>Floride</li><li>Nouveau-Mexique</li><li>Nouvelle-Galles du Sud</li></region><settlement><li>Sydney</li></settlement><orgName><li>Université de Sydney</li></orgName></list><tree><country name="Autriche"><noRegion><name sortKey="Breger, M" sort="Breger, M" uniqKey="Breger M" first="M." last="Breger">M. Breger</name></noRegion><name sortKey="Bischof, K M" sort="Bischof, K M" uniqKey="Bischof K" first="K. M." last="Bischof">K. M. Bischof</name><name sortKey="Breger, M" sort="Breger, M" uniqKey="Breger M" first="M." last="Breger">M. Breger</name><name sortKey="Breger, M" sort="Breger, M" uniqKey="Breger M" first="M." last="Breger">M. Breger</name><name sortKey="Handler, G" sort="Handler, G" uniqKey="Handler G" first="G." last="Handler">G. Handler</name><name sortKey="Heiter, U" sort="Heiter, U" uniqKey="Heiter U" first="U." last="Heiter">U. Heiter</name><name sortKey="Rodler, F" sort="Rodler, F" uniqKey="Rodler F" first="F." last="Rodler">F. Rodler</name><name sortKey="Stankov, A" sort="Stankov, A" uniqKey="Stankov A" first="A." last="Stankov">A. Stankov</name><name sortKey="Zima, W" sort="Zima, W" uniqKey="Zima W" first="W." last="Zima">W. Zima</name></country><country name="Espagne"><noRegion><name sortKey="Garrido, R" sort="Garrido, R" uniqKey="Garrido R" first="R." last="Garrido">R. Garrido</name></noRegion></country><country name="Afrique du Sud"><noRegion><name sortKey="Handler, G" sort="Handler, G" uniqKey="Handler G" first="G." last="Handler">G. Handler</name></noRegion><name sortKey="Martinez, P" sort="Martinez, P" uniqKey="Martinez P" first="P." last="Martinez">P. Martinez</name><name sortKey="O Donoghue, D" sort="O Donoghue, D" uniqKey="O Donoghue D" first="D." last="O'Donoghue">D. O'Donoghue</name></country><country name="États-Unis"><region name="Floride"><name sortKey="Wood, M A" sort="Wood, M A" uniqKey="Wood M" first="M. A." last="Wood">M. A. Wood</name></region><name sortKey="Barban, C" sort="Barban, C" uniqKey="Barban C" first="C." last="Barban">C. Barban</name><name sortKey="Gray, R O" sort="Gray, R O" uniqKey="Gray R" first="R. O." last="Gray">R. O. Gray</name><name sortKey="Kaye, A B" sort="Kaye, A B" uniqKey="Kaye A" first="A. B." last="Kaye">A. B. Kaye</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Shobbrook, R R" sort="Shobbrook, R R" uniqKey="Shobbrook R" first="R. R." last="Shobbrook">R. R. Shobbrook</name></region></country><country name="Hongrie"><noRegion><name sortKey="Szab, R" sort="Szab, R" uniqKey="Szab R" first="R." last="Szab">R. Szab</name></noRegion></country><country name="France"><noRegion><name sortKey="Barban, C" sort="Barban, C" uniqKey="Barban C" first="C." last="Barban">C. Barban</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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