Reference : Differential asteroseismic study of seismic twins observed by CoRoT. Comparison of HD...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/163070
Differential asteroseismic study of seismic twins observed by CoRoT. Comparison of HD 175272 with HD 181420
English
Ozel, N. [Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, 4000, Liège, Belgium; Department of Astronomy and Space Science, Erciyes University, 38039 Melikgazi, Kayseri, Turkey]
Mosser, B. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France]
Dupret, Marc-Antoine mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Bruntt, H. [Department of Physics and Astronomy, Aarhus University, 8000, Aarhus C, Denmark]
Barban, C. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France]
Deheuvels, S. [Université de Toulouse, UPS-OMP, IRAP, 31400, Toulouse, France; NRS, IRAP, 14 avenue Édouard Belin, 31400, Toulouse, France]
García, R. A. [Laboratoire AIM, CEA/DSM, CNRS - Université Paris Diderot, , IRFU/SAp, 91191, Gif-sur-Yvette Cedex, France]
Michel, Eric [> >]
Samadi, R. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France]
Baudin, F. [Institut d'Astrophysique Spatiale, UMR 8617, Université Paris Sud, , 91405, Orsay Cedex, France]
Mathur, S. [Space Science Institute, 4750 Walnut street Suite# 205, Boulder, CO, 80301, USA]
Régulo, C. [Instituto de Astrofisica de Canarias, 38205, La Laguna, Tenerife, Spain; Universidad de La Laguna, Dpto de Astrofisica, 38206, La Laguna, Tenerife, Spain]
Auvergne, M. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France]
Catala, C. [LESIA, CNRS, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195, Meudon Cedex, France]
Morel, P. [Université de Nice-Sophia Antipolis, CNRS UMR 7293, Observatoire de la Côte d'Azur, Laboratoire J.L. Lagrange, BP 4229, 06304, Nice Cedex 04, France]
Pichon, B. [Université de Nice-Sophia Antipolis, CNRS UMR 7293, Observatoire de la Côte d'Azur, Laboratoire J.L. Lagrange, BP 4229, 06304, Nice Cedex 04, France)]
1-Oct-2013
Astronomy and Astrophysics
558
79
Yes (verified by ORBi)
International
0004-6361
1432-0746
[en] asteroseismology ; stars: interiors ; techniques: photometric ; stars: evolution ; stars: individual: HD 175272 ; stars: individual: HD 181420
[en] Context. The CoRoT short asteroseismic runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report the observation and modeling of the F5V star HD 175272. <BR /> Aims: Our aim is to define a method for extracting as much information as possible from a noisy oscillation spectrum. <BR /> Methods: We followed a differential approach that consists of using a well-known star as a reference to characterize another star. We used classical tools such as the envelope autocorrelation function to derive the global seismic parameters of the star. We compared HD 175272 with HD 181420 through a linear approach, because they appear to be asteroseismic twins. <BR /> Results: The comparison with the reference star enables us to substantially enhance the scientific output for HD 175272. First, we determined its global characteristics through a detailed seismic analysis of HD 181420. Second, with our differential approach, we measured the difference of mass, radius and age between HD 175272 and HD 181420. <BR /> Conclusions: We have developed a general method able to derive asteroseismic constraints on a star even in case of low-quality data. This method can be applied to stars with interesting properties but low signal-to-noise ratio oscillation spectrum, such as stars hosting an exoplanet or members of a binary system. The CoRoT space mission, launched on 2006 December 27, was developed and is operated by the CNES, with participation of the Science Programs of ESA, ESAs RSSD, Austria, Belgium, Brazil, Germany and Spain.
http://hdl.handle.net/2268/163070
10.1051/0004-6361/201321846
http://adsabs.harvard.edu/abs/2013A%26A...558A..79O

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