The CoRoT target HD 175726: an active star with weak solar-like oscillations
Identifieur interne : 008042 ( Main/Exploration ); précédent : 008041; suivant : 008043The CoRoT target HD 175726: an active star with weak solar-like oscillations
Auteurs : B. Mosser [France] ; E. Michel [France] ; T. Appourchaux [France] ; C. Barban [France] ; F. Baudin [France] ; P. Boumier [France] ; H. Bruntt [France, Australie] ; C. Catala [France] ; S. Deheuvels [France] ; R. A. Garcia [France] ; P. Gaulme [France] ; C. Regulo [Espagne] ; I. Roxburgh [France, Royaume-Uni] ; R. Samadi [France] ; G. Vemer [Royaume-Uni] ; M. Auvergne [France] ; A. Baglin [France] ; J. Ballot [France] ; O. Benomar [France] ; S. Mathur [Inde]Source :
- Astronomy and astrophysics : (Berlin. Print) [ 0004-6361 ] ; 2009.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Context. The CoRoT short runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report observations of the star HD 175726 that lasted for 27 days during the first short run of the mission. The time series reveals a high-activity signal and the power spectrum presents an excess due to solar-like oscillations with a low signal-to-noise ratio. Aims. Our aim is to identify the most efficient tools to extract as much information as possible from the power density spectrum. Methods. The most productive method appears to be the autocorrelation of the time series, calculated as the spectrum of the filtered spectrum. This method is efficient, very rapid computationally, and will be useful for the analysis of other targets, observed with CoRoT or with forthcoming missions such as Kepler and Plato. Results. The mean large separation has been measured to be 97.2 ± 0.5 μHz, slightly below the expected value determined from solar scaling laws. We also show strong evidence for variation of the large separation with frequency. The bolometric mode amplitude is only 1.7 ± 0.25 ppm for radial modes, which is 1.7 times less than expected. Due to the low signal-to-noise ratio, mode identification is not possible for the available data set of HD 175726.
Affiliations:
- Australie, Espagne, France, Inde, Royaume-Uni
- Midi-Pyrénées, Nouvelle-Galles du Sud, Occitanie (région administrative), Île-de-France
- Meudon, Orsay, Paris, Sydney, Toulouse
- Université Paris-Sud, Université Pierre-et-Marie-Curie, Université de Sydney
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 002979
- to stream PascalFrancis, to step Curation: 003604
- to stream PascalFrancis, to step Checkpoint: 002787
- to stream Main, to step Merge: 008756
- to stream Main, to step Curation: 008042
Le document en format XML
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Regulo</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Instituto de Astrofísica de Canarias</s1><s2>38205 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>12 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>Instituto de Astrofísica de Canarias</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Universidad de la Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>12 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>Universidad de la Laguna</wicri:noRegion></affiliation></author><author><name sortKey="Roxburgh, I" sort="Roxburgh, I" uniqKey="Roxburgh I" first="I." last="Roxburgh">I. Roxburgh</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astronomy Unit, Queen Mary, University of London Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London E1 4NS</wicri:noRegion></affiliation></author><author><name sortKey="Samadi, R" sort="Samadi, R" uniqKey="Samadi R" first="R." last="Samadi">R. Samadi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Vemer, G" sort="Vemer, G" uniqKey="Vemer G" first="G." last="Vemer">G. Vemer</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astronomy Unit, Queen Mary, University of London Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London E1 4NS</wicri:noRegion></affiliation></author><author><name sortKey="Auvergne, M" sort="Auvergne, M" uniqKey="Auvergne M" first="M." last="Auvergne">M. Auvergne</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Baglin, A" sort="Baglin, A" uniqKey="Baglin A" first="A." last="Baglin">A. Baglin</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Ballot, J" sort="Ballot, J" uniqKey="Ballot J" first="J." last="Ballot">J. Ballot</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 av. Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>18 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="Benomar, O" sort="Benomar, O" uniqKey="Benomar O" first="O." last="Benomar">O. Benomar</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</region></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="09"><s1>Indian Institute of Astrophysics</s1><s2>Bangalore</s2><s3>IND</s3><sZ>20 aut.</sZ></inist:fA14><country>Inde</country><wicri:noRegion>Indian Institute of Astrophysics</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0011909</idno><date when="2009">2009</date><idno type="stanalyst">PASCAL 10-0011909 INIST</idno><idno type="RBID">Pascal:10-0011909</idno><idno type="wicri:Area/PascalFrancis/Corpus">002979</idno><idno type="wicri:Area/PascalFrancis/Curation">003604</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">002787</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">002787</idno><idno type="wicri:doubleKey">0004-6361:2009:Mosser B:the:corot:target</idno><idno type="wicri:Area/Main/Merge">008756</idno><idno type="wicri:Area/Main/Curation">008042</idno><idno type="wicri:Area/Main/Exploration">008042</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">The CoRoT target HD 175726: an active star with weak solar-like oscillations</title><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="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Meudon</settlement><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Michel, E" sort="Michel, E" uniqKey="Michel E" first="E." last="Michel">E. Michel</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Appourchaux, T" sort="Appourchaux, T" uniqKey="Appourchaux T" first="T." last="Appourchaux">T. Appourchaux</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</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="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Baudin, F" sort="Baudin, F" uniqKey="Baudin F" first="F." last="Baudin">F. Baudin</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Boumier, P" sort="Boumier, P" uniqKey="Boumier P" first="P." last="Boumier">P. Boumier</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Bruntt, H" sort="Bruntt, H" uniqKey="Bruntt H" first="H." last="Bruntt">H. Bruntt</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Sydney Institute for Astronomy, School of Physics, The University of Sydney</s1><s2>NSW 2006</s2><s3>AUS</s3><sZ>7 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="Catala, C" sort="Catala, C" uniqKey="Catala C" first="C." last="Catala">C. Catala</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Meudon</settlement><settlement type="city">Paris</settlement></placeName><orgName type="university">Université Pierre-et-Marie-Curie</orgName></affiliation></author><author><name sortKey="Deheuvels, S" sort="Deheuvels, S" uniqKey="Deheuvels S" first="S." last="Deheuvels">S. Deheuvels</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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 - Univ. Paris 7 Diderot - IRFU/SAp</s1><s2>91191 Gif-sur-Yvette</s2><s3>FRA</s3><sZ>10 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91191 Gif-sur-Yvette</wicri:noRegion><wicri:noRegion>CEA/DSM-CNRS - Univ. Paris 7 Diderot - IRFU/SAp</wicri:noRegion><wicri:noRegion>91191 Gif-sur-Yvette</wicri:noRegion></affiliation></author><author><name sortKey="Gaulme, P" sort="Gaulme, P" uniqKey="Gaulme P" first="P." last="Gaulme">P. Gaulme</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</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="1"><inist:fA14 i1="05"><s1>Instituto de Astrofísica de Canarias</s1><s2>38205 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>12 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>Instituto de Astrofísica de Canarias</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Universidad de la Laguna</s1><s2>38206 La Laguna, Tenerife</s2><s3>ESP</s3><sZ>12 aut.</sZ></inist:fA14><country>Espagne</country><wicri:noRegion>Universidad de la Laguna</wicri:noRegion></affiliation></author><author><name sortKey="Roxburgh, I" sort="Roxburgh, I" uniqKey="Roxburgh I" first="I." last="Roxburgh">I. Roxburgh</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astronomy Unit, Queen Mary, University of London Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London E1 4NS</wicri:noRegion></affiliation></author><author><name sortKey="Samadi, R" sort="Samadi, R" uniqKey="Samadi R" first="R." last="Samadi">R. Samadi</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Vemer, G" sort="Vemer, G" uniqKey="Vemer G" first="G." last="Vemer">G. Vemer</name><affiliation wicri:level="1"><inist:fA14 i1="07"><s1>Astronomy Unit, Queen Mary, University of London Mile End Road</s1><s2>London E1 4NS</s2><s3>GBR</s3><sZ>13 aut.</sZ><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>London E1 4NS</wicri:noRegion></affiliation></author><author><name sortKey="Auvergne, M" sort="Auvergne, M" uniqKey="Auvergne M" first="M." last="Auvergne">M. Auvergne</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Baglin, A" sort="Baglin, A" uniqKey="Baglin A" first="A." last="Baglin">A. Baglin</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris</s1><s2>92195 Meudon</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>8 aut.</sZ><sZ>9 aut.</sZ><sZ>13 aut.</sZ><sZ>14 aut.</sZ><sZ>16 aut.</sZ><sZ>17 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="Ballot, J" sort="Ballot, J" uniqKey="Ballot J" first="J." last="Ballot">J. Ballot</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 av. Edouard Belin</s1><s2>31400 Toulouse</s2><s3>FRA</s3><sZ>18 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="Benomar, O" sort="Benomar, O" uniqKey="Benomar O" first="O." last="Benomar">O. Benomar</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>Institut d'Astrophysique Spatiale, UMR8617, Université Paris XI, Bâtiment 121</s1><s2>91405 Orsay</s2><s3>FRA</s3><sZ>3 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>11 aut.</sZ><sZ>19 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>91405 Orsay</wicri:noRegion><wicri:noRegion>Bâtiment 121</wicri:noRegion><wicri:noRegion>91405 Orsay</wicri:noRegion><orgName type="university">Université Paris-Sud</orgName><placeName><settlement type="city">Orsay</settlement><region type="region" nuts="2">Île-de-France</region></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="09"><s1>Indian Institute of Astrophysics</s1><s2>Bangalore</s2><s3>IND</s3><sZ>20 aut.</sZ></inist:fA14><country>Inde</country><wicri:noRegion>Indian Institute of Astrophysics</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="2009">2009</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>Autocorrelations</term><term>Late type stars</term><term>Power spectra</term><term>Scaling laws</term><term>Signal-to-noise ratio</term><term>Time series</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Etoile type avancé</term><term>Série temporelle</term><term>Spectre puissance</term><term>Rapport signal bruit</term><term>Autocorrélation</term><term>Loi échelle</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Context. The CoRoT short runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report observations of the star HD 175726 that lasted for 27 days during the first short run of the mission. The time series reveals a high-activity signal and the power spectrum presents an excess due to solar-like oscillations with a low signal-to-noise ratio. Aims. Our aim is to identify the most efficient tools to extract as much information as possible from the power density spectrum. Methods. The most productive method appears to be the autocorrelation of the time series, calculated as the spectrum of the filtered spectrum. This method is efficient, very rapid computationally, and will be useful for the analysis of other targets, observed with CoRoT or with forthcoming missions such as Kepler and Plato. Results. The mean large separation has been measured to be 97.2 ± 0.5 μHz, slightly below the expected value determined from solar scaling laws. We also show strong evidence for variation of the large separation with frequency. The bolometric mode amplitude is only 1.7 ± 0.25 ppm for radial modes, which is 1.7 times less than expected. Due to the low signal-to-noise ratio, mode identification is not possible for the available data set of HD 175726.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Espagne</li><li>France</li><li>Inde</li><li>Royaume-Uni</li></country><region><li>Midi-Pyrénées</li><li>Nouvelle-Galles du Sud</li><li>Occitanie (région administrative)</li><li>Île-de-France</li></region><settlement><li>Meudon</li><li>Orsay</li><li>Paris</li><li>Sydney</li><li>Toulouse</li></settlement><orgName><li>Université Paris-Sud</li><li>Université Pierre-et-Marie-Curie</li><li>Université de Sydney</li></orgName></list><tree><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="Appourchaux, T" sort="Appourchaux, T" uniqKey="Appourchaux T" first="T." last="Appourchaux">T. Appourchaux</name><name sortKey="Auvergne, M" sort="Auvergne, M" uniqKey="Auvergne M" first="M." last="Auvergne">M. Auvergne</name><name sortKey="Baglin, A" sort="Baglin, A" uniqKey="Baglin A" first="A." last="Baglin">A. Baglin</name><name sortKey="Ballot, J" sort="Ballot, J" uniqKey="Ballot J" first="J." last="Ballot">J. Ballot</name><name sortKey="Barban, C" sort="Barban, C" uniqKey="Barban C" first="C." last="Barban">C. Barban</name><name sortKey="Baudin, F" sort="Baudin, F" uniqKey="Baudin F" first="F." last="Baudin">F. Baudin</name><name sortKey="Benomar, O" sort="Benomar, O" uniqKey="Benomar O" first="O." last="Benomar">O. Benomar</name><name sortKey="Boumier, P" sort="Boumier, P" uniqKey="Boumier P" first="P." last="Boumier">P. Boumier</name><name sortKey="Bruntt, H" sort="Bruntt, H" uniqKey="Bruntt H" first="H." last="Bruntt">H. Bruntt</name><name sortKey="Catala, C" sort="Catala, C" uniqKey="Catala C" first="C." last="Catala">C. Catala</name><name sortKey="Deheuvels, S" sort="Deheuvels, S" uniqKey="Deheuvels S" first="S." last="Deheuvels">S. Deheuvels</name><name sortKey="Garcia, R A" sort="Garcia, R A" uniqKey="Garcia R" first="R. A." last="Garcia">R. A. Garcia</name><name sortKey="Gaulme, P" sort="Gaulme, P" uniqKey="Gaulme P" first="P." last="Gaulme">P. Gaulme</name><name sortKey="Michel, E" sort="Michel, E" uniqKey="Michel E" first="E." last="Michel">E. Michel</name><name sortKey="Roxburgh, I" sort="Roxburgh, I" uniqKey="Roxburgh I" first="I." last="Roxburgh">I. Roxburgh</name><name sortKey="Samadi, R" sort="Samadi, R" uniqKey="Samadi R" first="R." last="Samadi">R. Samadi</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Bruntt, H" sort="Bruntt, H" uniqKey="Bruntt H" first="H." last="Bruntt">H. Bruntt</name></region></country><country name="Espagne"><noRegion><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name></noRegion><name sortKey="Regulo, C" sort="Regulo, C" uniqKey="Regulo C" first="C." last="Regulo">C. Regulo</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Roxburgh, I" sort="Roxburgh, I" uniqKey="Roxburgh I" first="I." last="Roxburgh">I. Roxburgh</name></noRegion><name sortKey="Vemer, G" sort="Vemer, G" uniqKey="Vemer G" first="G." last="Vemer">G. Vemer</name></country><country name="Inde"><noRegion><name sortKey="Mathur, S" sort="Mathur, S" uniqKey="Mathur S" first="S." last="Mathur">S. Mathur</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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|type= RBID
|clé= Pascal:10-0011909
|texte= The CoRoT target HD 175726: an active star with weak solar-like oscillations
}}
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