[en] Thanks to the precision of Kepler observations, [3] were able to measure the linewidth and amplitude of individual modes (including mixed modes) in several sub- giant power spectra. We perform a forward modelling of a Kepler subgiant based on sur- face properties and observed frequencies. Non-adiabatic computations including a time- dependent treatment of convection give the lifetimes of radial and non-radial modes. Next, combining the lifetimes and inertias with a stochastic excitation model gives the ampli- tudes of the modes. We can now directly compare theoretical and observed linewidths and amplitudes of mixed-modes to obtain new constraints on our theoretical models.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Grosjean, Mathieu ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Dupret, Marc-Antoine ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Belkacem, Kevin; Observatoire de Paris-Meudon > LESIA
Benomar, Othman; University of Tokyo > Departement of Astronomy
Deheuvels, Sebastien; Université de Toulouse > UPS-OMP > IRAP
Samadi, Reza; Observatoire de Paris-Meudon > LESIA
Grigahcene, Ahmed; Instituto de Astrofisica de Andalucia
Language :
English
Title :
Non-adiabatic study of the Kepler subgiant KIC 6442183
Publication date :
September 2015
Event name :
CoRoT Symposium 3, Kepler KASC-7 joint meeting
Event date :
du 6 juillet 2014 au 11 juillet 2014
Audience :
International
Main work title :
The Space Photometry Revolution CoRoT Symposium 3, Kepler KASC-7 joint meeting
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
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