Non-adiabatic study of the Kepler subgiant KIC 6442183

M. Grosjean; M. A. Dupret; K. Belkacem; O. Benomar; S. Deheuvels; R. Samadi; A. Grigahcene

doi:10.1051/epjconf/201510106028

Non-adiabatic study of the Kepler subgiant KIC 6442183

M. Grosjean, M. A. Dupret, K. Belkacem, O. Benomar, S. Deheuvels, R. Samadi, A. Grigahcene

Center for Space Science

Research output: Contribution to journal › Conference article

Abstract

Thanks to the precision of Kepler observations, [3] 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.

Original language	English (US)
Article number	06028
Journal	EPJ Web of Conferences
Volume	101
DOIs	https://doi.org/10.1051/epjconf/201510106028
State	Published - Sep 23 2015
Event	CoRoT Symposium 3, Kepler KASC-7 Joint Meeting on Space Photometry Revolution - Toulouse, France Duration: Jul 6 2014 → Jul 11 2014

ASJC Scopus subject areas

Physics and Astronomy(all)

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Grosjean, M., Dupret, M. A., Belkacem, K., Benomar, O., Deheuvels, S., Samadi, R., & Grigahcene, A. (2015). Non-adiabatic study of the Kepler subgiant KIC 6442183. EPJ Web of Conferences, 101, [06028]. https://doi.org/10.1051/epjconf/201510106028

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abstract = "Thanks to the precision of Kepler observations, [3] 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.",

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AU - Grosjean, M.

AU - Dupret, M. A.

AU - Belkacem, K.

AU - Benomar, O.

AU - Deheuvels, S.

AU - Samadi, R.

AU - Grigahcene, A.

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AB - Thanks to the precision of Kepler observations, [3] 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.

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