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Spectrum analysis and seismic interpretation of a solar‐like pulsator (HD 49933) observed by CoRoT
Author(s) -
Benomar O.,
Baudin F.,
Marques J.P.,
Goupil M.J.,
Lebreton Y.,
Deheuvels S.
Publication year - 2010
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201011435
Subject(s) - overshoot (microwave communication) , interpretation (philosophy) , oscillation (cell signaling) , diffusion , spectrum (functional analysis) , astrophysics , convection , physics , star (game theory) , core (optical fiber) , chemistry , computer science , mechanics , optics , thermodynamics , quantum mechanics , telecommunications , biochemistry , programming language
Abstract The star HD 49933 has been observed by the mission CoRoT two times (for 60 and 137 days). Its spectrum shows a wealth of oscillation modes but was found difficult to analyse. In the following, we summarize why it was so, and then present a modeling of the star using seismic constraints and show the effect of the microscopic diffusion and of the overshoot in the modeling. We conclude that some convective overshoot from the core is needed while it is difficult to give a definitive conclusion concerning the effect of the microscopic diffusion on the modeling of HD 49933 (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)