Kepler photometry of the prototypical Blazhko star RR Lyr: an old friend seen in a new light
Identifieur interne : 006402 ( Main/Exploration ); précédent : 006401; suivant : 006403Kepler photometry of the prototypical Blazhko star RR Lyr: an old friend seen in a new light
Auteurs : K. Kolenberg [Autriche] ; S. Bryson [États-Unis] ; R. Szab [Hongrie] ; D. W. Kurtz ; R. Smolec [Autriche] ; J. M. Nemec [Canada] ; E. Guggenberger [Autriche] ; P. Moskalik [Pologne] ; J. M. Benk [Hongrie] ; M. Chadid [France] ; Y. Jeon [Corée du Sud] ; L. L. Kiss [Hongrie, Australie] ; G. Kopacki [Pologne] ; J. Nuspl [Hongrie] ; M. Still [États-Unis] ; J. Christensen-Dalsgaard [Danemark] ; H. Kjeldsen [Danemark] ; W. J. Borucki [États-Unis] ; D. A. Caldwell [États-Unis] ; J. M. Jenkins [États-Unis] ; D. Koch [États-Unis]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011-02-21.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
- Acta astron, Additional cycles, Amplitude, Amplitude modulation, Amplitude ratios, Analytical signal method, Astron, Asymmetry, Benk, Blazhko, Blazhko cycle, Blazhko cycles, Blazhko effect, Blazhko frequency, Blazhko modulation, Blazhko period, Blazhko phase, Blazhko star, Blazhko stars, Bottom panels, Bright star, Buchler, Case study, Central column, Chadid, Communications asteroseismology, Consecutive blazhko cycles, Error bars, Exact repetition, Fourier, Fourier parameters, Fourier spectrum, Frequency spectrum, Frequency values, Harmonics, High degree, Higher orders, Horizontal-branch stars, Jurcsik, Kepler, Kepler data, Kepler magnitudes, Kepler photometry, Kolenberg, Koll, Light curve, Light curves, Lower maxima, Lyrae, Lyrae stars, Main frequency, Mnras, Modulation, Modulation components, Monthly notices, Moskalik, Multiplet, Multiplet components, Multiplets, Ndings, Overtone, Period change, Periodicity, Phase differences, Photometry, Pixel, Pulsation, Pulsation frequency, Quintuplet, Quintuplet components, RR Lyrae stars, Radial mode, S stars, Satellite observation, Star light, Strict repetition, Szab, Szeidl, Szeidl jurcsik, Time base, Transient phenomena, Triplet, Triplet components, Variable stars.
- Teeft :
- Acta astron, Additional cycles, Amplitude, Amplitude modulation, Amplitude ratios, Analytical signal method, Astron, Asymmetry, Benk, Blazhko, Blazhko cycle, Blazhko cycles, Blazhko effect, Blazhko frequency, Blazhko modulation, Blazhko period, Blazhko phase, Blazhko star, Blazhko stars, Bottom panels, Buchler, Central column, Chadid, Communications asteroseismology, Consecutive blazhko cycles, Error bars, Exact repetition, Fourier, Fourier parameters, Fourier spectrum, Frequency spectrum, Frequency values, Harmonics, High degree, Higher orders, Jurcsik, Kepler, Kepler data, Kepler magnitudes, Kepler photometry, Kolenberg, Koll, Light curve, Light curves, Lower maxima, Lyrae, Lyrae stars, Main frequency, Mnras, Modulation, Modulation components, Monthly notices, Moskalik, Multiplet, Multiplet components, Ndings, Overtone, Period change, Phase differences, Photometry, Pixel, Pulsation, Pulsation frequency, Quintuplet, Quintuplet components, Radial mode, Strict repetition, Szab, Szeidl, Szeidl jurcsik, Time base, Transient phenomena, Triplet, Triplet components, Variable stars.
Abstract
We present our analysis of the long‐cadence Kepler data for the well‐studied Blazhko star RR Lyr, gathered during the first two quarters of the satellite’s observations and covering a total of 127 d. Besides being of great importance for our understanding of RR Lyrae stars in general, these RR Lyr data can be regarded as a case study for observations of bright stars with Kepler. Kepler can perform high‐precision photometry on targets like RR Lyr, as the saturated flux is conserved to a very high degree. The Kepler data on RR Lyr are revolutionary in several respects. Even with long‐cadence sampling (one measurement per 29.4 min), the unprecedented precision (< mmag) of the Kepler photometry allows the study of the star’s extreme light‐curve variations in detail. The multiplet structures at the main frequency and its harmonics, typical for Blazhko stars, are clearly detected up to the quintuplets. For the first time, photometric data of RR Lyr reveal the presence of half‐integer frequencies, linked to a period‐doubling effect. This phenomenon may be connected to the still unexplained Blazhko modulation. Moreover, with three observed Blazhko cycles at our disposal, we observe that there is no exact repetition in the light‐curve changes from one modulation cycle to the next for RR Lyr. This may be due to additional periodicities in the star, or to transient or quasi‐periodic changes.
Url:
DOI: 10.1111/j.1365-2966.2010.17728.x
Affiliations:
- Australie, Autriche, Canada, Corée du Sud, Danemark, France, Hongrie, Pologne, États-Unis
- Californie, Nouvelle-Galles du Sud, Provence-Alpes-Côte d'Azur
- Nice, Sydney
- Université de Sydney
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Chadid</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Observatoire de la Côte dAzur, Université Nice Sophia‐Antipolis, UMR 6525, Parc Valrose, 06108 Nice Cedex 02</wicri:regionArea><placeName><region type="region" nuts="2">Provence-Alpes-Côte d'Azur</region><settlement type="city">Nice</settlement></placeName></affiliation></author><author><name sortKey="Jeon, Y" sort="Jeon, Y" uniqKey="Jeon Y" first="Y." last="Jeon">Y. Jeon</name><affiliation wicri:level="1"><country xml:lang="fr">Corée du Sud</country><wicri:regionArea>Korea Astronomy and Space Science Institute, Daejeon 305‐348</wicri:regionArea><wicri:noRegion>Daejeon 305‐348</wicri:noRegion></affiliation></author><author><name sortKey="Kiss, L L" sort="Kiss, L L" uniqKey="Kiss L" first="L. L." last="Kiss">L. L. 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Kjeldsen</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Department of Physics and Astronomy, Aarhus University, DK‐8000 Aarhus C</wicri:regionArea><wicri:noRegion>DK‐8000 Aarhus C</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="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>NASA Ames Research Center, MS 244‐30, Moffet Field, CA 94035</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Caldwell, D A" sort="Caldwell, D A" uniqKey="Caldwell D" first="D. A." last="Caldwell">D. A. Caldwell</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>SETI Institute, Mountain View, CA 94043</wicri:regionArea><placeName><region type="state">Californie</region></placeName></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="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>SETI Institute, Mountain View, CA 94043</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Koch, D" sort="Koch, D" uniqKey="Koch D" first="D." last="Koch">D. Koch</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>NASA Ames Research Center, MS 244‐30, Moffet Field, CA 94035</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="alt">MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><biblScope unit="vol">411</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="878">878</biblScope><biblScope unit="page" to="890">890</biblScope><biblScope unit="page-count">13</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-02-21">2011-02-21</date></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>Acta astron</term><term>Additional cycles</term><term>Amplitude</term><term>Amplitude modulation</term><term>Amplitude ratios</term><term>Analytical signal method</term><term>Astron</term><term>Asymmetry</term><term>Benk</term><term>Blazhko</term><term>Blazhko cycle</term><term>Blazhko cycles</term><term>Blazhko effect</term><term>Blazhko frequency</term><term>Blazhko modulation</term><term>Blazhko period</term><term>Blazhko phase</term><term>Blazhko star</term><term>Blazhko stars</term><term>Bottom panels</term><term>Bright star</term><term>Buchler</term><term>Case study</term><term>Central column</term><term>Chadid</term><term>Communications asteroseismology</term><term>Consecutive blazhko cycles</term><term>Error bars</term><term>Exact repetition</term><term>Fourier</term><term>Fourier parameters</term><term>Fourier spectrum</term><term>Frequency spectrum</term><term>Frequency values</term><term>Harmonics</term><term>High degree</term><term>Higher orders</term><term>Horizontal-branch stars</term><term>Jurcsik</term><term>Kepler</term><term>Kepler data</term><term>Kepler magnitudes</term><term>Kepler photometry</term><term>Kolenberg</term><term>Koll</term><term>Light curve</term><term>Light curves</term><term>Lower maxima</term><term>Lyrae</term><term>Lyrae stars</term><term>Main frequency</term><term>Mnras</term><term>Modulation</term><term>Modulation components</term><term>Monthly notices</term><term>Moskalik</term><term>Multiplet</term><term>Multiplet components</term><term>Multiplets</term><term>Ndings</term><term>Overtone</term><term>Period change</term><term>Periodicity</term><term>Phase differences</term><term>Photometry</term><term>Pixel</term><term>Pulsation</term><term>Pulsation frequency</term><term>Quintuplet</term><term>Quintuplet components</term><term>RR Lyrae stars</term><term>Radial mode</term><term>S stars</term><term>Satellite observation</term><term>Star light</term><term>Strict repetition</term><term>Szab</term><term>Szeidl</term><term>Szeidl jurcsik</term><term>Time base</term><term>Transient phenomena</term><term>Triplet</term><term>Triplet components</term><term>Variable stars</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Courbe lumière</term><term>Etoile S</term><term>Etoile branche horizontale</term><term>Etoile brillante</term><term>Etoile type RR Lyrae</term><term>Etude cas</term><term>Lumière stellaire</term><term>Multiplet</term><term>Observation par satellite</term><term>Photométrie</term><term>Périodicité</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Acta astron</term><term>Additional cycles</term><term>Amplitude</term><term>Amplitude modulation</term><term>Amplitude ratios</term><term>Analytical signal method</term><term>Astron</term><term>Asymmetry</term><term>Benk</term><term>Blazhko</term><term>Blazhko cycle</term><term>Blazhko cycles</term><term>Blazhko effect</term><term>Blazhko frequency</term><term>Blazhko modulation</term><term>Blazhko period</term><term>Blazhko phase</term><term>Blazhko star</term><term>Blazhko stars</term><term>Bottom panels</term><term>Buchler</term><term>Central column</term><term>Chadid</term><term>Communications asteroseismology</term><term>Consecutive blazhko cycles</term><term>Error bars</term><term>Exact repetition</term><term>Fourier</term><term>Fourier parameters</term><term>Fourier spectrum</term><term>Frequency spectrum</term><term>Frequency values</term><term>Harmonics</term><term>High degree</term><term>Higher orders</term><term>Jurcsik</term><term>Kepler</term><term>Kepler data</term><term>Kepler magnitudes</term><term>Kepler photometry</term><term>Kolenberg</term><term>Koll</term><term>Light curve</term><term>Light curves</term><term>Lower maxima</term><term>Lyrae</term><term>Lyrae stars</term><term>Main frequency</term><term>Mnras</term><term>Modulation</term><term>Modulation components</term><term>Monthly notices</term><term>Moskalik</term><term>Multiplet</term><term>Multiplet components</term><term>Ndings</term><term>Overtone</term><term>Period change</term><term>Phase differences</term><term>Photometry</term><term>Pixel</term><term>Pulsation</term><term>Pulsation frequency</term><term>Quintuplet</term><term>Quintuplet components</term><term>Radial mode</term><term>Strict repetition</term><term>Szab</term><term>Szeidl</term><term>Szeidl jurcsik</term><term>Time base</term><term>Transient phenomena</term><term>Triplet</term><term>Triplet components</term><term>Variable stars</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present our analysis of the long‐cadence Kepler data for the well‐studied Blazhko star RR Lyr, gathered during the first two quarters of the satellite’s observations and covering a total of 127 d. Besides being of great importance for our understanding of RR Lyrae stars in general, these RR Lyr data can be regarded as a case study for observations of bright stars with Kepler. Kepler can perform high‐precision photometry on targets like RR Lyr, as the saturated flux is conserved to a very high degree. The Kepler data on RR Lyr are revolutionary in several respects. Even with long‐cadence sampling (one measurement per 29.4 min), the unprecedented precision (< mmag) of the Kepler photometry allows the study of the star’s extreme light‐curve variations in detail. The multiplet structures at the main frequency and its harmonics, typical for Blazhko stars, are clearly detected up to the quintuplets. For the first time, photometric data of RR Lyr reveal the presence of half‐integer frequencies, linked to a period‐doubling effect. This phenomenon may be connected to the still unexplained Blazhko modulation. Moreover, with three observed Blazhko cycles at our disposal, we observe that there is no exact repetition in the light‐curve changes from one modulation cycle to the next for RR Lyr. This may be due to additional periodicities in the star, or to transient or quasi‐periodic changes.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Autriche</li><li>Canada</li><li>Corée du Sud</li><li>Danemark</li><li>France</li><li>Hongrie</li><li>Pologne</li><li>États-Unis</li></country><region><li>Californie</li><li>Nouvelle-Galles du Sud</li><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Nice</li><li>Sydney</li></settlement><orgName><li>Université de Sydney</li></orgName></list><tree><noCountry><name sortKey="Kurtz, D W" sort="Kurtz, D W" uniqKey="Kurtz D" first="D. W." last="Kurtz">D. W. Kurtz</name></noCountry><country name="Autriche"><noRegion><name sortKey="Kolenberg, K" sort="Kolenberg, K" uniqKey="Kolenberg K" first="K." last="Kolenberg">K. Kolenberg</name></noRegion><name sortKey="Guggenberger, E" sort="Guggenberger, E" uniqKey="Guggenberger E" first="E." last="Guggenberger">E. Guggenberger</name><name sortKey="Kolenberg, K" sort="Kolenberg, K" uniqKey="Kolenberg K" first="K." last="Kolenberg">K. Kolenberg</name><name sortKey="Smolec, R" sort="Smolec, R" uniqKey="Smolec R" first="R." last="Smolec">R. Smolec</name></country><country name="États-Unis"><region name="Californie"><name sortKey="Bryson, S" sort="Bryson, S" uniqKey="Bryson S" first="S." last="Bryson">S. Bryson</name></region><name sortKey="Borucki, W J" sort="Borucki, W J" uniqKey="Borucki W" first="W. J." last="Borucki">W. J. Borucki</name><name sortKey="Caldwell, D A" sort="Caldwell, D A" uniqKey="Caldwell D" first="D. A." last="Caldwell">D. A. Caldwell</name><name sortKey="Jenkins, J M" sort="Jenkins, J M" uniqKey="Jenkins J" first="J. M." last="Jenkins">J. M. Jenkins</name><name sortKey="Koch, D" sort="Koch, D" uniqKey="Koch D" first="D." last="Koch">D. Koch</name><name sortKey="Still, M" sort="Still, M" uniqKey="Still M" first="M." last="Still">M. Still</name></country><country name="Hongrie"><noRegion><name sortKey="Szab, R" sort="Szab, R" uniqKey="Szab R" first="R." last="Szab">R. Szab</name></noRegion><name sortKey="Benk, J M" sort="Benk, J M" uniqKey="Benk J" first="J. M." last="Benk">J. M. Benk</name><name sortKey="Kiss, L L" sort="Kiss, L L" uniqKey="Kiss L" first="L. L." last="Kiss">L. L. Kiss</name><name sortKey="Nuspl, J" sort="Nuspl, J" uniqKey="Nuspl J" first="J." last="Nuspl">J. Nuspl</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="Pologne"><noRegion><name sortKey="Moskalik, P" sort="Moskalik, P" uniqKey="Moskalik P" first="P." last="Moskalik">P. Moskalik</name></noRegion><name sortKey="Kopacki, G" sort="Kopacki, G" uniqKey="Kopacki G" first="G." last="Kopacki">G. Kopacki</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="Corée du Sud"><noRegion><name sortKey="Jeon, Y" sort="Jeon, Y" uniqKey="Jeon Y" first="Y." last="Jeon">Y. Jeon</name></noRegion></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Kiss, L L" sort="Kiss, L L" uniqKey="Kiss L" first="L. L." last="Kiss">L. L. Kiss</name></region></country><country name="Danemark"><noRegion><name sortKey="Christensen Alsgaard, J" sort="Christensen Alsgaard, J" uniqKey="Christensen Alsgaard 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></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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