Solar-like oscillations in red giants observed with Kepler: comparison of global oscillation parameters from different methods
Identifieur interne : 006717 ( Main/Exploration ); précédent : 006716; suivant : 006718Solar-like oscillations in red giants observed with Kepler: comparison of global oscillation parameters from different methods
Auteurs : S. Hekker [Royaume-Uni] ; Y. Elsworth [Royaume-Uni] ; J. De Ridder [Belgique] ; B. Mosser [France] ; R. A. Garcia [France] ; T. Kallinger [Canada, Autriche] ; S. Mathur [États-Unis] ; D. Huber [Australie] ; D. L. Buzasi [États-Unis] ; H. L. Preston [États-Unis, Afrique du Sud] ; S. J. Hale [Royaume-Uni] ; J. Ballot [France] ; W. J. Chaplin [Royaume-Uni] ; C. Regulo [Espagne] ; T. R. Bedding [Australie] ; D. Stello [Australie] ; W. J. Borucki [États-Unis] ; D. G. Koch [États-Unis] ; J. Jenkins [États-Unis] ; C. Allen [États-Unis] ; R. L. Gilliland [États-Unis] ; H. Kjeldsen [Danemark] ; J. Christensen-Dalsgaard [Danemark]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2011.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Context. The large number of stars for which uninterrupted high-precision photometric timeseries data are being collected with Kepler and CoRoT initiated the development of automated methods to analyse the stochastically excited oscillations in main-sequence, subgiant and red-giant stars. Aims. We investigate the differences in results for global oscillation parameters of G and K red-giant stars due to different methods and definitions. We also investigate uncertainties originating from the stochastic nature of the oscillations. Methods. For this investigation we use Kepler data obtained during the first four months of operation. These data have been analysed by different groups using already published methods and the results are compared. We also performed simulations to investigate the uncertainty on the resulting parameters due to different realizations of the stochastic signal. Results. We obtain results for the frequency of maximum oscillation power (νmax) and the mean large separation (?Δν?) from different methods for over one thousand red-giant stars. The results for these parameters agree within a few percent and seem therefore robust to the different analysis methods and definitions used here. The uncertainties for νmax and ?Δν? due to differences in realization noise are not negligible and should be taken into account when using these results for stellar modelling.
Affiliations:
- Afrique du Sud, Australie, Autriche, Belgique, Canada, Danemark, Espagne, France, Royaume-Uni, États-Unis
- Angleterre, Canaries, Midi-Pyrénées, Midlands de l'Ouest, Nouvelle-Galles du Sud, Occitanie (région administrative), Province du Brabant flamand, Vienne (Autriche), Île-de-France
- Birmingham, Heverlee, Louvain, Paris, Sydney, Toulouse, Vienne (Autriche)
- Université Pierre-et-Marie-Curie, Université de Birmingham, Université de Sydney
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Ballot</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse</s1><s2>CNRS, 31400 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>31400 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation></author><author><name sortKey="Chaplin, W J" sort="Chaplin, W J" uniqKey="Chaplin W" first="W. J." last="Chaplin">W. J. Chaplin</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>University of Birmingham, School of Physics and Astronomy, Edgbaston</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>11 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Birmingham B15 2TT</wicri:noRegion><orgName type="university">Université de Birmingham</orgName><placeName><settlement type="city">Birmingham</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Midlands de l'Ouest</region></placeName></affiliation></author><author><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name><affiliation wicri:level="2"><inist:fA14 i1="12"><s1>Universidad de La Laguna, Dpto de Astrofísica</s1><s2>38206 Tenerife</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="13"><s1>Instituto de Astrofísica de Canarias, 38205 La Laguna</s1><s2>Tenerife</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation></author><author><name sortKey="Bedding, T R" sort="Bedding, T R" uniqKey="Bedding T" first="T. R." last="Bedding">T. R. Bedding</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>8 aut.</sZ><sZ>15 aut.</sZ><sZ>16 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="Stello, D" sort="Stello, D" uniqKey="Stello D" first="D." last="Stello">D. Stello</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>8 aut.</sZ><sZ>15 aut.</sZ><sZ>16 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="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="14"><s1>NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Koch, D G" sort="Koch, D G" uniqKey="Koch D" first="D. G." last="Koch">D. G. Koch</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Jenkins, J" sort="Jenkins, J" uniqKey="Jenkins J" first="J." last="Jenkins">J. Jenkins</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>SETI Institute, NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Allen, C" sort="Allen, C" uniqKey="Allen C" first="C." last="Allen">C. Allen</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Orbital Sciences Corp., NASA Ames Research Center</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</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="17"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>21 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</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="18"><s1>Department of Physics and Astronomy, Building 1520, Aarhus University</s1><s2>8000 Aarhus C</s2><s3>DNK</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus C</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="18"><s1>Department of Physics and Astronomy, Building 1520, Aarhus University</s1><s2>8000 Aarhus C</s2><s3>DNK</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus C</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0238116</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0238116 INIST</idno><idno type="RBID">Pascal:11-0238116</idno><idno type="wicri:Area/PascalFrancis/Corpus">001D55</idno><idno type="wicri:Area/PascalFrancis/Curation">004187</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001670</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001670</idno><idno type="wicri:doubleKey">0004-6361:2011:Hekker S:solar:like:oscillations</idno><idno type="wicri:Area/Main/Merge">006B21</idno><idno type="wicri:Area/Main/Curation">006717</idno><idno type="wicri:Area/Main/Exploration">006717</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Solar-like oscillations in red giants observed with Kepler: comparison of global oscillation parameters from different methods</title><author><name sortKey="Hekker, S" sort="Hekker, S" uniqKey="Hekker S" first="S." last="Hekker">S. Hekker</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>University of Birmingham, School of Physics and Astronomy, Edgbaston</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>11 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Birmingham B15 2TT</wicri:noRegion><orgName type="university">Université de Birmingham</orgName><placeName><settlement type="city">Birmingham</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Midlands de l'Ouest</region></placeName></affiliation></author><author><name sortKey="Elsworth, Y" sort="Elsworth, Y" uniqKey="Elsworth Y" first="Y." last="Elsworth">Y. Elsworth</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>University of Birmingham, School of Physics and Astronomy, Edgbaston</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>11 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Birmingham B15 2TT</wicri:noRegion><orgName type="university">Université de Birmingham</orgName><placeName><settlement type="city">Birmingham</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Midlands de l'Ouest</region></placeName></affiliation></author><author><name sortKey="De Ridder, J" sort="De Ridder, J" uniqKey="De Ridder J" first="J." last="De Ridder">J. De Ridder</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Instituut voor Sterrenkunde, KU Leuven, Celestijnenlaan 200D</s1><s2>3001 Leuven</s2><s3>BEL</s3><sZ>3 aut.</sZ></inist:fA14><country>Belgique</country><placeName><region type="province" nuts="2">Province du Brabant flamand</region><settlement type="town">Heverlee</settlement><settlement type="city">Louvain</settlement></placeName></affiliation></author><author><name sortKey="Mosser, B" sort="Mosser, B" uniqKey="Mosser B" first="B." last="Mosser">B. Mosser</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>4 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>92195 Meudon</wicri:noRegion><wicri:noRegion>Observatoire de Paris</wicri:noRegion><wicri:noRegion>92195 Meudon</wicri:noRegion><orgName type="university">Université Pierre-et-Marie-Curie</orgName><placeName><settlement type="city">Paris</settlement><region type="region" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Garcia, R A" sort="Garcia, R A" uniqKey="Garcia R" first="R. A." last="Garcia">R. A. Garcia</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Laboratoire AIM, CEA/DSM-CNRS, Université Paris 7 Denis Diderot, IRFU/SAp, Centre de Saclay</s1><s2>91191 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>5 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91191 Gif-sur-Yvette</wicri:noRegion><wicri:noRegion>Centre de Saclay</wicri:noRegion><wicri:noRegion>91191 Gif-sur-Yvette</wicri:noRegion></affiliation></author><author><name sortKey="Kallinger, T" sort="Kallinger, T" uniqKey="Kallinger T" first="T." last="Kallinger">T. Kallinger</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Physics and Astronomy, University of British Colombia, 6224 Agricultural Road</s1><s2>Vancouver, BC V6T 1Z1</s2><s3>CAN</s3><sZ>6 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Vancouver, BC V6T 1Z1</wicri:noRegion></affiliation><affiliation wicri:level="3"><inist:fA14 i1="06"><s1>Institute for Astronomy, University of Vienna, Türkenschanzstrasse 17</s1><s2>1180 Vienna</s2><s3>AUT</s3><sZ>6 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="Mathur, S" sort="Mathur, S" uniqKey="Mathur S" first="S." last="Mathur">S. Mathur</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>High Altitude Observatory, NCAR, PO Box 3000</s1><s2>Boulder, CO 80307</s2><s3>USA</s3><sZ>7 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Boulder, CO 80307</wicri:noRegion></affiliation></author><author><name sortKey="Huber, D" sort="Huber, D" uniqKey="Huber D" first="D." last="Huber">D. Huber</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>8 aut.</sZ><sZ>15 aut.</sZ><sZ>16 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="Buzasi, D L" sort="Buzasi, D L" uniqKey="Buzasi D" first="D. L." last="Buzasi">D. L. Buzasi</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>Eureka Scientific, 2452 Delmer Street Suite 100</s1><s2>Oakland, CA 94602-3017</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Oakland, CA 94602-3017</wicri:noRegion></affiliation></author><author><name sortKey="Preston, H L" sort="Preston, H L" uniqKey="Preston H" first="H. L." last="Preston">H. L. Preston</name><affiliation wicri:level="1"><inist:fA14 i1="09"><s1>Eureka Scientific, 2452 Delmer Street Suite 100</s1><s2>Oakland, CA 94602-3017</s2><s3>USA</s3><sZ>9 aut.</sZ><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Oakland, CA 94602-3017</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Mathematical Sciences, University of South Africa, Box 392</s1><s2>UNISA 0003</s2><s3>ZAF</s3><sZ>10 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>UNISA 0003</wicri:noRegion></affiliation></author><author><name sortKey="Hale, S J" sort="Hale, S J" uniqKey="Hale S" first="S. J." last="Hale">S. J. Hale</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>University of Birmingham, School of Physics and Astronomy, Edgbaston</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>11 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Birmingham B15 2TT</wicri:noRegion><orgName type="university">Université de Birmingham</orgName><placeName><settlement type="city">Birmingham</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Midlands de l'Ouest</region></placeName></affiliation></author><author><name sortKey="Ballot, J" sort="Ballot, J" uniqKey="Ballot J" first="J." last="Ballot">J. Ballot</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse</s1><s2>CNRS, 31400 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>31400 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation></author><author><name sortKey="Chaplin, W J" sort="Chaplin, W J" uniqKey="Chaplin W" first="W. J." last="Chaplin">W. J. Chaplin</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>University of Birmingham, School of Physics and Astronomy, Edgbaston</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>11 aut.</sZ><sZ>13 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Birmingham B15 2TT</wicri:noRegion><orgName type="university">Université de Birmingham</orgName><placeName><settlement type="city">Birmingham</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Midlands de l'Ouest</region></placeName></affiliation></author><author><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name><affiliation wicri:level="2"><inist:fA14 i1="12"><s1>Universidad de La Laguna, Dpto de Astrofísica</s1><s2>38206 Tenerife</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation><affiliation wicri:level="2"><inist:fA14 i1="13"><s1>Instituto de Astrofísica de Canarias, 38205 La Laguna</s1><s2>Tenerife</s2><s3>ESP</s3><sZ>14 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Canaries</region></placeName></affiliation></author><author><name sortKey="Bedding, T R" sort="Bedding, T R" uniqKey="Bedding T" first="T. R." last="Bedding">T. R. Bedding</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>8 aut.</sZ><sZ>15 aut.</sZ><sZ>16 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="Stello, D" sort="Stello, D" uniqKey="Stello D" first="D." last="Stello">D. Stello</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>8 aut.</sZ><sZ>15 aut.</sZ><sZ>16 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="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="14"><s1>NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Koch, D G" sort="Koch, D G" uniqKey="Koch D" first="D. G." last="Koch">D. G. Koch</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>17 aut.</sZ><sZ>18 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Jenkins, J" sort="Jenkins, J" uniqKey="Jenkins J" first="J." last="Jenkins">J. Jenkins</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>SETI Institute, NASA Ames Research Center, MS 244-30</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>19 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</wicri:noRegion></affiliation></author><author><name sortKey="Allen, C" sort="Allen, C" uniqKey="Allen C" first="C." last="Allen">C. Allen</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Orbital Sciences Corp., NASA Ames Research Center</s1><s2>Moffet Field, CA 94035</s2><s3>USA</s3><sZ>20 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Moffet Field, CA 94035</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="17"><s1>Space Telescope Science Institute, 3700 San Martin Drive</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>21 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</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="18"><s1>Department of Physics and Astronomy, Building 1520, Aarhus University</s1><s2>8000 Aarhus C</s2><s3>DNK</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus C</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="18"><s1>Department of Physics and Astronomy, Building 1520, Aarhus University</s1><s2>8000 Aarhus C</s2><s3>DNK</s3><sZ>22 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Danemark</country><wicri:noRegion>8000 Aarhus C</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Astronomy and astrophysics : (Berlin. Print)</title><title level="j" type="abbreviated">Astron. astrophys. : (Berl., Print)</title><idno type="ISSN">0004-6361</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Astroseismology</term><term>Giant stars</term><term>K stars</term><term>Late type stars</term><term>Red giant stars</term><term>Red stars</term><term>Subgiant star</term><term>Uncertainty</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Géante rouge</term><term>Sous géante</term><term>Etoile rouge</term><term>Etoile géante</term><term>Etoile K</term><term>Incertitude</term><term>Astéroséismologie</term><term>Etoile type avancé</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Context. The large number of stars for which uninterrupted high-precision photometric timeseries data are being collected with Kepler and CoRoT initiated the development of automated methods to analyse the stochastically excited oscillations in main-sequence, subgiant and red-giant stars. Aims. We investigate the differences in results for global oscillation parameters of G and K red-giant stars due to different methods and definitions. We also investigate uncertainties originating from the stochastic nature of the oscillations. Methods. For this investigation we use Kepler data obtained during the first four months of operation. These data have been analysed by different groups using already published methods and the results are compared. We also performed simulations to investigate the uncertainty on the resulting parameters due to different realizations of the stochastic signal. Results. We obtain results for the frequency of maximum oscillation power (ν<sub>max</sub>) and the mean large separation (?Δν?) from different methods for over one thousand red-giant stars. The results for these parameters agree within a few percent and seem therefore robust to the different analysis methods and definitions used here. The uncertainties for ν<sub>max</sub> and ?Δν? due to differences in realization noise are not negligible and should be taken into account when using these results for stellar modelling.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li><li>Australie</li><li>Autriche</li><li>Belgique</li><li>Canada</li><li>Danemark</li><li>Espagne</li><li>France</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Angleterre</li><li>Canaries</li><li>Midi-Pyrénées</li><li>Midlands de l'Ouest</li><li>Nouvelle-Galles du Sud</li><li>Occitanie (région administrative)</li><li>Province du Brabant flamand</li><li>Vienne (Autriche)</li><li>Île-de-France</li></region><settlement><li>Birmingham</li><li>Heverlee</li><li>Louvain</li><li>Paris</li><li>Sydney</li><li>Toulouse</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li><li>Université de Birmingham</li><li>Université de Sydney</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Hekker, S" sort="Hekker, S" uniqKey="Hekker S" first="S." last="Hekker">S. Hekker</name></region><name sortKey="Chaplin, W J" sort="Chaplin, W J" uniqKey="Chaplin W" first="W. J." last="Chaplin">W. J. Chaplin</name><name sortKey="Elsworth, Y" sort="Elsworth, Y" uniqKey="Elsworth Y" first="Y." last="Elsworth">Y. Elsworth</name><name sortKey="Hale, S J" sort="Hale, S J" uniqKey="Hale S" first="S. J." last="Hale">S. J. Hale</name></country><country name="Belgique"><region name="Province du Brabant flamand"><name sortKey="De Ridder, J" sort="De Ridder, J" uniqKey="De Ridder J" first="J." last="De Ridder">J. De Ridder</name></region></country><country name="France"><region name="Île-de-France"><name sortKey="Mosser, B" sort="Mosser, B" uniqKey="Mosser B" first="B." last="Mosser">B. Mosser</name></region><name sortKey="Ballot, J" sort="Ballot, J" uniqKey="Ballot J" first="J." last="Ballot">J. Ballot</name><name sortKey="Garcia, R A" sort="Garcia, R A" uniqKey="Garcia R" first="R. A." last="Garcia">R. A. Garcia</name></country><country name="Canada"><noRegion><name sortKey="Kallinger, T" sort="Kallinger, T" uniqKey="Kallinger T" first="T." last="Kallinger">T. Kallinger</name></noRegion></country><country name="Autriche"><region name="Vienne (Autriche)"><name sortKey="Kallinger, T" sort="Kallinger, T" uniqKey="Kallinger T" first="T." last="Kallinger">T. Kallinger</name></region></country><country name="États-Unis"><noRegion><name sortKey="Mathur, S" sort="Mathur, S" uniqKey="Mathur S" first="S." last="Mathur">S. Mathur</name></noRegion><name sortKey="Allen, C" sort="Allen, C" uniqKey="Allen C" first="C." last="Allen">C. Allen</name><name sortKey="Borucki, W J" sort="Borucki, W J" uniqKey="Borucki W" first="W. J." last="Borucki">W. J. Borucki</name><name sortKey="Buzasi, D L" sort="Buzasi, D L" uniqKey="Buzasi D" first="D. L." last="Buzasi">D. L. Buzasi</name><name sortKey="Gilliland, R L" sort="Gilliland, R L" uniqKey="Gilliland R" first="R. L." last="Gilliland">R. L. Gilliland</name><name sortKey="Jenkins, J" sort="Jenkins, J" uniqKey="Jenkins J" first="J." last="Jenkins">J. Jenkins</name><name sortKey="Koch, D G" sort="Koch, D G" uniqKey="Koch D" first="D. G." last="Koch">D. G. Koch</name><name sortKey="Preston, H L" sort="Preston, H L" uniqKey="Preston H" first="H. L." last="Preston">H. L. Preston</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Huber, D" sort="Huber, D" uniqKey="Huber D" first="D." last="Huber">D. Huber</name></region><name sortKey="Bedding, T R" sort="Bedding, T R" uniqKey="Bedding T" first="T. R." last="Bedding">T. R. Bedding</name><name sortKey="Stello, D" sort="Stello, D" uniqKey="Stello D" first="D." last="Stello">D. Stello</name></country><country name="Afrique du Sud"><noRegion><name sortKey="Preston, H L" sort="Preston, H L" uniqKey="Preston H" first="H. L." last="Preston">H. L. Preston</name></noRegion></country><country name="Espagne"><region name="Canaries"><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name></region><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name></country><country name="Danemark"><noRegion><name sortKey="Kjeldsen, H" sort="Kjeldsen, H" uniqKey="Kjeldsen H" first="H." last="Kjeldsen">H. Kjeldsen</name></noRegion><name sortKey="Christensen Dalsgaard, J" sort="Christensen Dalsgaard, J" uniqKey="Christensen Dalsgaard J" first="J." last="Christensen-Dalsgaard">J. Christensen-Dalsgaard</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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