FIRST KEPLER RESULTS ON RR LYRAE STARS
Identifieur interne : 007863 ( Main/Exploration ); précédent : 007862; suivant : 007864FIRST KEPLER RESULTS ON RR LYRAE STARS
Auteurs : K. Kolenberg [Autriche] ; R. Szabo [Hongrie] ; D. W. Kurtz [Royaume-Uni] ; R. L. Gilliland [États-Unis] ; J. Christensen-Dalsgaard [Danemark] ; H. Kjeldsen [Danemark] ; T. M. Brown [États-Unis] ; J. M. Benko [Hongrie] ; M. Chadid [France] ; A. Derekas [Hongrie, Australie] ; M. Di Criscienzo [Italie] ; E. Guggenberger [Autriche] ; K. Kinemuchi [États-Unis, Chili] ; A. Kunder [Chili] ; Z. Kollath [Hongrie] ; G. Kopacki [Pologne] ; P. Moskalik [Pologne] ; J. M. Nemec [Canada] ; J. Nuspl [Hongrie] ; R. Silvotti [Italie] ; M. D. Suran [Roumanie] ; W. J. Borucki [États-Unis] ; D. Koch [États-Unis] ; J. M. Jenkins [États-Unis]Source :
- The Astrophysical journal [ 0004-637X ] ; 2010.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We present the first results of our analyses of selected RR Lyrae stars for which data have been obtained by the Kepler Mission. As expected, we find a significant fraction of the RRab stars to show the Blazhko effect, a still unexplained phenomenon that manifests itself as periodic amplitude and phase modulations of the light curve, on timescales of typically tens to hundreds of days. The long time span of the Kepler Mission of 3.5 yr and the unprecedentedly high precision of its data provide a unique opportunity for the study of RR Lyrae stars. Using data of a modulated star observed in the first roll as a showcase, we discuss the data, our analyses, findings, and their implications for our understanding of RR Lyrae stars and the Blazhko effect. With at least 40% of the RR Lyrae stars in our sample showing modulation, we confirm the high incidence rate that was only found in recent high-precision studies. Moreover, we report the occurrence of additional frequencies, beyond the main pulsation mode and its modulation components. Their half-integer ratio to the main frequency is reminiscent of a period doubling effect caused by resonances, observed for the first time in RR Lyrae stars.
Affiliations:
- Australie, Autriche, Canada, Chili, Danemark, France, Hongrie, Italie, Pologne, Roumanie, Royaume-Uni, États-Unis
- Latium, Nouvelle-Galles du Sud, Provence-Alpes-Côte d'Azur, Vienne (Autriche)
- Nice, Rome, Sydney, Vienne (Autriche)
- Université Nice Sophia Antipolis, Université de Sydney
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">FIRST KEPLER RESULTS ON RR LYRAE STARS</title><author><name sortKey="Kolenberg, K" sort="Kolenberg, K" uniqKey="Kolenberg K" first="K." last="Kolenberg">K. Kolenberg</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Institut für Astronomie, Universitat Wien, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>1 aut.</sZ><sZ>12 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author><author><name sortKey="Szabo, R" sort="Szabo, R" uniqKey="Szabo R" first="R." last="Szabo">R. Szabo</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. 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Kjeldsen</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics and Astronomy, Aarhus University</s1><s2>8000 Aarhus</s2><s3>DNK</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus</wicri:noRegion></affiliation></author><author><name sortKey="Brown, T M" sort="Brown, T M" uniqKey="Brown T" first="T. M." last="Brown">T. M. Brown</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Las Cumbres Observatory Global Telescope</s1><s2>Goleta, CA 93117</s2><s3>USA</s3><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Las Cumbres Observatory Global Telescope</wicri:noRegion></affiliation></author><author><name sortKey="Benko, J M" sort="Benko, J M" uniqKey="Benko J" first="J. M." last="Benko">J. M. Benko</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Chadid, M" sort="Chadid, M" uniqKey="Chadid M" first="M." last="Chadid">M. Chadid</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Observatoire de la Cote d'Azur, Universite Nice Sophia-Antipolis, UMR 6525. Parc Valrose</s1><s2>06108 Nice</s2><s3>FRA</s3><sZ>9 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>06108 Nice</wicri:noRegion><wicri:noRegion>UMR 6525. Parc Valrose</wicri:noRegion><wicri:noRegion>06108 Nice</wicri:noRegion><orgName type="university">Université Nice Sophia Antipolis</orgName><placeName><settlement type="city">Nice</settlement><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region></placeName></affiliation></author><author><name sortKey="Derekas, A" sort="Derekas, A" uniqKey="Derekas A" first="A." last="Derekas">A. Derekas</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy. School of Physics A28, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><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="Di Criscienzo, M" sort="Di Criscienzo, M" uniqKey="Di Criscienzo M" first="M." last="Di Criscienzo">M. Di Criscienzo</name><affiliation wicri:level="3"><inist:fA14 i1="09"><s1>INAF-Osservatorio Astronomico di Roma, Via Frascati 33</s1><s2>00040 Monte Porzio Catone, Rome</s2><s3>ITA</s3><sZ>11 aut.</sZ></inist:fA14><country>Italie</country><placeName><settlement type="city">Rome</settlement><region nuts="2">Latium</region></placeName></affiliation></author><author><name sortKey="Guggenberger, E" sort="Guggenberger, E" uniqKey="Guggenberger E" first="E." last="Guggenberger">E. Guggenberger</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Institut für Astronomie, Universitat Wien, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>1 aut.</sZ><sZ>12 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author><author><name sortKey="Kinemuchi, K" sort="Kinemuchi, K" uniqKey="Kinemuchi K" first="K." last="Kinemuchi">K. Kinemuchi</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Astronomy. 211 Bryant Space Science Center, University of Florida</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>13 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Gainesville, FL 32611</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Departamento de Astronomía, Universidad de Concepción, Casilla 160-C</s1><s2>Concepcion</s2><s3>CHL</s3><sZ>13 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>Concepcion</wicri:noRegion></affiliation></author><author><name sortKey="Kunder, A" sort="Kunder, A" uniqKey="Kunder A" first="A." last="Kunder">A. Kunder</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory</s1><s2>La Serena</s2><s3>CHL</s3><sZ>14 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>La Serena</wicri:noRegion></affiliation></author><author><name sortKey="Kollath, Z" sort="Kollath, Z" uniqKey="Kollath Z" first="Z." last="Kollath">Z. Kollath</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Kopacki, G" sort="Kopacki, G" uniqKey="Kopacki G" first="G." last="Kopacki">G. Kopacki</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Instytut Astronomiczny Uniwersytetu Wrocławskiego, Kopernika 11</s1><s2>51-622 Wrocław</s2><s3>POL</s3><sZ>16 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>51-622 Wrocław</wicri:noRegion></affiliation></author><author><name sortKey="Moskalik, P" sort="Moskalik, P" uniqKey="Moskalik P" first="P." last="Moskalik">P. Moskalik</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Copernicus Astronomical Centre, ul. Bartycka 18</s1><s2>00-716 Warsaw</s2><s3>POL</s3><sZ>17 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>00-716 Warsaw</wicri:noRegion></affiliation></author><author><name sortKey="Nemec, J M" sort="Nemec, J M" uniqKey="Nemec J" first="J. M." last="Nemec">J. M. Nemec</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Department of Physics & Astronomy, Camosun College</s1><s2>Victoria, British Columbia</s2><s3>CAN</s3><sZ>18 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Victoria, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Nuspl, J" sort="Nuspl, J" uniqKey="Nuspl J" first="J." last="Nuspl">J. Nuspl</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Silvotti, R" sort="Silvotti, R" uniqKey="Silvotti R" first="R." last="Silvotti">R. Silvotti</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>INAF-Osservatorio Astronomico di Torino, Strada dell'Osservatorio 20</s1><s2>10025 Pino Torinese</s2><s3>ITA</s3><sZ>20 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>10025 Pino Torinese</wicri:noRegion></affiliation></author><author><name sortKey="Suran, M D" sort="Suran, M D" uniqKey="Suran M" first="M. D." last="Suran">M. D. Suran</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Astronomical Institute of the Romanian Academy. Str. Cutitul de Argint, 5</s1><s2>40557, Bucharest</s2><s3>ROU</s3><sZ>21 aut.</sZ></inist:fA14><country>Roumanie</country><wicri:noRegion>40557, Bucharest</wicri:noRegion></affiliation></author><author><name sortKey="Borucki, W J" sort="Borucki, W J" uniqKey="Borucki W" first="W. J." last="Borucki">W. J. Borucki</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author><author><name sortKey="Koch, D" sort="Koch, D" uniqKey="Koch D" first="D." last="Koch">D. Koch</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author><author><name sortKey="Jenkins, J M" sort="Jenkins, J M" uniqKey="Jenkins J" first="J. M." last="Jenkins">J. M. Jenkins</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>SETI Institute/NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>SETI Institute/NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0273571</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 11-0273571 INIST</idno><idno type="RBID">Pascal:11-0273571</idno><idno type="wicri:Area/PascalFrancis/Corpus">001C81</idno><idno type="wicri:Area/PascalFrancis/Curation">004262</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">002409</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">002409</idno><idno type="wicri:doubleKey">0004-637X:2010:Kolenberg K:first:kepler:results</idno><idno type="wicri:Area/Main/Merge">007E77</idno><idno type="wicri:Area/Main/Curation">007863</idno><idno type="wicri:Area/Main/Exploration">007863</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">FIRST KEPLER RESULTS ON RR LYRAE STARS</title><author><name sortKey="Kolenberg, K" sort="Kolenberg, K" uniqKey="Kolenberg K" first="K." last="Kolenberg">K. Kolenberg</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Institut für Astronomie, Universitat Wien, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>1 aut.</sZ><sZ>12 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author><author><name sortKey="Szabo, R" sort="Szabo, R" uniqKey="Szabo R" first="R." last="Szabo">R. Szabo</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Kurtz, D W" sort="Kurtz, D W" uniqKey="Kurtz D" first="D. W." last="Kurtz">D. W. Kurtz</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Jeremiah Horrocks Institute of Astrophysics. University of Central Lancashire</s1><s2>Preston PR 1 2HE</s2><s3>GBR</s3><sZ>3 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Jeremiah Horrocks Institute of Astrophysics. University of Central Lancashire</wicri:noRegion></affiliation></author><author><name sortKey="Gilliland, R L" sort="Gilliland, R L" uniqKey="Gilliland R" first="R. L." last="Gilliland">R. L. Gilliland</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Christensen Dalsgaard, J" sort="Christensen Dalsgaard, J" uniqKey="Christensen Dalsgaard J" first="J." last="Christensen-Dalsgaard">J. Christensen-Dalsgaard</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics and Astronomy, Aarhus University</s1><s2>8000 Aarhus</s2><s3>DNK</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus</wicri:noRegion></affiliation></author><author><name sortKey="Kjeldsen, H" sort="Kjeldsen, H" uniqKey="Kjeldsen H" first="H." last="Kjeldsen">H. Kjeldsen</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics and Astronomy, Aarhus University</s1><s2>8000 Aarhus</s2><s3>DNK</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus</wicri:noRegion></affiliation></author><author><name sortKey="Brown, T M" sort="Brown, T M" uniqKey="Brown T" first="T. M." last="Brown">T. M. Brown</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Las Cumbres Observatory Global Telescope</s1><s2>Goleta, CA 93117</s2><s3>USA</s3><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Las Cumbres Observatory Global Telescope</wicri:noRegion></affiliation></author><author><name sortKey="Benko, J M" sort="Benko, J M" uniqKey="Benko J" first="J. M." last="Benko">J. M. Benko</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Chadid, M" sort="Chadid, M" uniqKey="Chadid M" first="M." last="Chadid">M. Chadid</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Observatoire de la Cote d'Azur, Universite Nice Sophia-Antipolis, UMR 6525. Parc Valrose</s1><s2>06108 Nice</s2><s3>FRA</s3><sZ>9 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>06108 Nice</wicri:noRegion><wicri:noRegion>UMR 6525. Parc Valrose</wicri:noRegion><wicri:noRegion>06108 Nice</wicri:noRegion><orgName type="university">Université Nice Sophia Antipolis</orgName><placeName><settlement type="city">Nice</settlement><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region></placeName></affiliation></author><author><name sortKey="Derekas, A" sort="Derekas, A" uniqKey="Derekas A" first="A." last="Derekas">A. Derekas</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy. School of Physics A28, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>10 aut.</sZ></inist:fA14><country>Australie</country><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="Di Criscienzo, M" sort="Di Criscienzo, M" uniqKey="Di Criscienzo M" first="M." last="Di Criscienzo">M. Di Criscienzo</name><affiliation wicri:level="3"><inist:fA14 i1="09"><s1>INAF-Osservatorio Astronomico di Roma, Via Frascati 33</s1><s2>00040 Monte Porzio Catone, Rome</s2><s3>ITA</s3><sZ>11 aut.</sZ></inist:fA14><country>Italie</country><placeName><settlement type="city">Rome</settlement><region nuts="2">Latium</region></placeName></affiliation></author><author><name sortKey="Guggenberger, E" sort="Guggenberger, E" uniqKey="Guggenberger E" first="E." last="Guggenberger">E. Guggenberger</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Institut für Astronomie, Universitat Wien, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>1 aut.</sZ><sZ>12 aut.</sZ></inist:fA14><country>Autriche</country><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName></affiliation></author><author><name sortKey="Kinemuchi, K" sort="Kinemuchi, K" uniqKey="Kinemuchi K" first="K." last="Kinemuchi">K. Kinemuchi</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Astronomy. 211 Bryant Space Science Center, University of Florida</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>13 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Gainesville, FL 32611</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Departamento de Astronomía, Universidad de Concepción, Casilla 160-C</s1><s2>Concepcion</s2><s3>CHL</s3><sZ>13 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>Concepcion</wicri:noRegion></affiliation></author><author><name sortKey="Kunder, A" sort="Kunder, A" uniqKey="Kunder A" first="A." last="Kunder">A. Kunder</name><affiliation wicri:level="1"><inist:fA14 i1="12"><s1>Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory</s1><s2>La Serena</s2><s3>CHL</s3><sZ>14 aut.</sZ></inist:fA14><country>Chili</country><wicri:noRegion>La Serena</wicri:noRegion></affiliation></author><author><name sortKey="Kollath, Z" sort="Kollath, Z" uniqKey="Kollath Z" first="Z." last="Kollath">Z. Kollath</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Kopacki, G" sort="Kopacki, G" uniqKey="Kopacki G" first="G." last="Kopacki">G. Kopacki</name><affiliation wicri:level="1"><inist:fA14 i1="13"><s1>Instytut Astronomiczny Uniwersytetu Wrocławskiego, Kopernika 11</s1><s2>51-622 Wrocław</s2><s3>POL</s3><sZ>16 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>51-622 Wrocław</wicri:noRegion></affiliation></author><author><name sortKey="Moskalik, P" sort="Moskalik, P" uniqKey="Moskalik P" first="P." last="Moskalik">P. Moskalik</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>Copernicus Astronomical Centre, ul. Bartycka 18</s1><s2>00-716 Warsaw</s2><s3>POL</s3><sZ>17 aut.</sZ></inist:fA14><country>Pologne</country><wicri:noRegion>00-716 Warsaw</wicri:noRegion></affiliation></author><author><name sortKey="Nemec, J M" sort="Nemec, J M" uniqKey="Nemec J" first="J. M." last="Nemec">J. M. Nemec</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Department of Physics & Astronomy, Camosun College</s1><s2>Victoria, British Columbia</s2><s3>CAN</s3><sZ>18 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Victoria, British Columbia</wicri:noRegion></affiliation></author><author><name sortKey="Nuspl, J" sort="Nuspl, J" uniqKey="Nuspl J" first="J." last="Nuspl">J. Nuspl</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</s1><s3>HUN</s3><sZ>2 aut.</sZ><sZ>8 aut.</sZ><sZ>10 aut.</sZ><sZ>15 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>Hongrie</country><wicri:noRegion>Konkoly Observatory, H-1525 Budapest, P.O. Box 67</wicri:noRegion></affiliation></author><author><name sortKey="Silvotti, R" sort="Silvotti, R" uniqKey="Silvotti R" first="R." last="Silvotti">R. Silvotti</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>INAF-Osservatorio Astronomico di Torino, Strada dell'Osservatorio 20</s1><s2>10025 Pino Torinese</s2><s3>ITA</s3><sZ>20 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>10025 Pino Torinese</wicri:noRegion></affiliation></author><author><name sortKey="Suran, M D" sort="Suran, M D" uniqKey="Suran M" first="M. D." last="Suran">M. D. Suran</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Astronomical Institute of the Romanian Academy. Str. Cutitul de Argint, 5</s1><s2>40557, Bucharest</s2><s3>ROU</s3><sZ>21 aut.</sZ></inist:fA14><country>Roumanie</country><wicri:noRegion>40557, Bucharest</wicri:noRegion></affiliation></author><author><name sortKey="Borucki, W J" sort="Borucki, W J" uniqKey="Borucki W" first="W. J." last="Borucki">W. J. Borucki</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author><author><name sortKey="Koch, D" sort="Koch, D" uniqKey="Koch D" first="D." last="Koch">D. Koch</name><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author><author><name sortKey="Jenkins, J M" sort="Jenkins, J M" uniqKey="Jenkins J" first="J. M." last="Jenkins">J. M. Jenkins</name><affiliation wicri:level="1"><inist:fA14 i1="19"><s1>SETI Institute/NASA Ames Research Center. MS 244-30</s1><s2>Moffett Field, CA 94035</s2><s3>USA</s3><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>SETI Institute/NASA Ames Research Center. MS 244-30</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Data analysis</term><term>Light curves</term><term>RR Lyrae stars</term><term>Resonance</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etoile type RR Lyrae</term><term>Courbe lumière</term><term>Analyse donnée</term><term>Résonance</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present the first results of our analyses of selected RR Lyrae stars for which data have been obtained by the Kepler Mission. As expected, we find a significant fraction of the RRab stars to show the Blazhko effect, a still unexplained phenomenon that manifests itself as periodic amplitude and phase modulations of the light curve, on timescales of typically tens to hundreds of days. The long time span of the Kepler Mission of 3.5 yr and the unprecedentedly high precision of its data provide a unique opportunity for the study of RR Lyrae stars. Using data of a modulated star observed in the first roll as a showcase, we discuss the data, our analyses, findings, and their implications for our understanding of RR Lyrae stars and the Blazhko effect. With at least 40% of the RR Lyrae stars in our sample showing modulation, we confirm the high incidence rate that was only found in recent high-precision studies. Moreover, we report the occurrence of additional frequencies, beyond the main pulsation mode and its modulation components. Their half-integer ratio to the main frequency is reminiscent of a period doubling effect caused by resonances, observed for the first time in RR Lyrae stars.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Autriche</li><li>Canada</li><li>Chili</li><li>Danemark</li><li>France</li><li>Hongrie</li><li>Italie</li><li>Pologne</li><li>Roumanie</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Latium</li><li>Nouvelle-Galles du Sud</li><li>Provence-Alpes-Côte d'Azur</li><li>Vienne (Autriche)</li></region><settlement><li>Nice</li><li>Rome</li><li>Sydney</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université Nice Sophia Antipolis</li><li>Université de Sydney</li></orgName></list><tree><country name="Autriche"><region name="Vienne (Autriche)"><name sortKey="Kolenberg, K" sort="Kolenberg, K" uniqKey="Kolenberg K" first="K." last="Kolenberg">K. Kolenberg</name></region><name sortKey="Guggenberger, E" sort="Guggenberger, E" uniqKey="Guggenberger E" first="E." last="Guggenberger">E. Guggenberger</name></country><country name="Hongrie"><noRegion><name sortKey="Szabo, R" sort="Szabo, R" uniqKey="Szabo R" first="R." last="Szabo">R. Szabo</name></noRegion><name sortKey="Benko, J M" sort="Benko, J M" uniqKey="Benko J" first="J. M." last="Benko">J. M. Benko</name><name sortKey="Derekas, A" sort="Derekas, A" uniqKey="Derekas A" first="A." last="Derekas">A. Derekas</name><name sortKey="Kollath, Z" sort="Kollath, Z" uniqKey="Kollath Z" first="Z." last="Kollath">Z. Kollath</name><name sortKey="Nuspl, J" sort="Nuspl, J" uniqKey="Nuspl J" first="J." last="Nuspl">J. Nuspl</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Kurtz, D W" sort="Kurtz, D W" uniqKey="Kurtz D" first="D. W." last="Kurtz">D. W. Kurtz</name></noRegion></country><country name="États-Unis"><noRegion><name sortKey="Gilliland, R L" sort="Gilliland, R L" uniqKey="Gilliland R" first="R. L." last="Gilliland">R. L. Gilliland</name></noRegion><name sortKey="Borucki, W J" sort="Borucki, W J" uniqKey="Borucki W" first="W. J." last="Borucki">W. J. Borucki</name><name sortKey="Brown, T M" sort="Brown, T M" uniqKey="Brown T" first="T. M." last="Brown">T. M. Brown</name><name sortKey="Jenkins, J M" sort="Jenkins, J M" uniqKey="Jenkins J" first="J. M." last="Jenkins">J. M. Jenkins</name><name sortKey="Kinemuchi, K" sort="Kinemuchi, K" uniqKey="Kinemuchi K" first="K." last="Kinemuchi">K. Kinemuchi</name><name sortKey="Koch, D" sort="Koch, D" uniqKey="Koch D" first="D." last="Koch">D. Koch</name></country><country name="Danemark"><noRegion><name sortKey="Christensen Dalsgaard, J" sort="Christensen Dalsgaard, J" uniqKey="Christensen Dalsgaard J" first="J." last="Christensen-Dalsgaard">J. Christensen-Dalsgaard</name></noRegion><name sortKey="Kjeldsen, H" sort="Kjeldsen, H" uniqKey="Kjeldsen H" first="H." last="Kjeldsen">H. Kjeldsen</name></country><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Chadid, M" sort="Chadid, M" uniqKey="Chadid M" first="M." last="Chadid">M. Chadid</name></region></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Derekas, A" sort="Derekas, A" uniqKey="Derekas A" first="A." last="Derekas">A. Derekas</name></region></country><country name="Italie"><region name="Latium"><name sortKey="Di Criscienzo, M" sort="Di Criscienzo, M" uniqKey="Di Criscienzo M" first="M." last="Di Criscienzo">M. Di Criscienzo</name></region><name sortKey="Silvotti, R" sort="Silvotti, R" uniqKey="Silvotti R" first="R." last="Silvotti">R. Silvotti</name></country><country name="Chili"><noRegion><name sortKey="Kinemuchi, K" sort="Kinemuchi, K" uniqKey="Kinemuchi K" first="K." last="Kinemuchi">K. Kinemuchi</name></noRegion><name sortKey="Kunder, A" sort="Kunder, A" uniqKey="Kunder A" first="A." last="Kunder">A. Kunder</name></country><country name="Pologne"><noRegion><name sortKey="Kopacki, G" sort="Kopacki, G" uniqKey="Kopacki G" first="G." last="Kopacki">G. Kopacki</name></noRegion><name sortKey="Moskalik, P" sort="Moskalik, P" uniqKey="Moskalik P" first="P." last="Moskalik">P. Moskalik</name></country><country name="Canada"><noRegion><name sortKey="Nemec, J M" sort="Nemec, J M" uniqKey="Nemec J" first="J. M." last="Nemec">J. M. Nemec</name></noRegion></country><country name="Roumanie"><noRegion><name sortKey="Suran, M D" sort="Suran, M D" uniqKey="Suran M" first="M. D." last="Suran">M. D. Suran</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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