Testing the forward approach in modelling beta Cephei pulsators: setting the stage - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




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Abstract: The information on stellar parameters and on the stellar interior we can getby studying pulsating stars depends crucially on the available observationalconstraints: both seismic constraints precision and number of detected modes,identification, nature of the modes and -classical- observations photosphericabundances, effective temperature, luminosity, surface gravity. We considerthe case of beta Cephei pulsators and, with the aim of estimatingquantitatively how the available observational constraints determine the typeand precision of our inferences, we set the stage for HareandHound exercises. Inthis contribution we present preliminary results for one simple case, where weassume as -observed- frequencies a subset of frequencies of a model and thenevaluate a seismic merit function on a dense and extensive grid of models ofB-type stars. We also compare the behaviour of chi^2 surfaces obtained with andwithout mode identification.



Author: A. Miglio, J. Montalban, A. Thoul Institut d'Astrophysique et de Géophysique, Université de Liège, Belgium

Source: https://arxiv.org/







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