Non-adiabatic study of the Kepler subgiant KIC 6442183
1 Institut d’astrophysique et de géophysique, Université de Liège, BELGIUM
2 LESIA, observatoire de Paris-Meudon, FRANCE
3 Departement of Astronomy, Univsersity of Tokyo, JAPAN
4 UPS-OMP, IRAP, Universitè de Toulouse, FRANCE
5 Instituto de Astrofisica de Andalucia, Camino Bajo de Huetor 50, Granada E-18008, SPAIN
Published online: 23 September 2015
Thanks to the precision of Kepler observations,  were able to measure the linewidth and amplitude of individual modes (including mixed modes) in several subgiant power spectra. We perform a forward modelling of a Kepler subgiant based on surface 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 amplitudes 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.
© Owned by the authors, published by EDP Sciences, 2015
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