Towards precise asteroseismology of solar-like stars
Abstract
Adiabatic modeling of solar-like oscillations cannot exceed a certain level of precision for fitting individual frequencies. This is known as the problem of near surface effects on the mode physics. We present a theoretical study which addresses the problem of frequency precision in non-adiabatic models using a time-dependent convection treatment. We find that the number of acceptable model solutions is significantly reduced and more precise constraints can be imposed on the models. Results obtained for a specific star (beta Hydri) lead to very good agreement with both global and local seismic observables. This indicates that the accuracy of model fitting to seismic data is greatly improved when a more complete description of the interaction between convection and pulsation is taken into account.
Keywords
Cite
@article{arxiv.1112.5961,
title = {Towards precise asteroseismology of solar-like stars},
author = {A. Grigahcène and M. -A. Dupret and S. G. Sousa and M. J. P. F. G. Monteiro and R. Garrido and R. Scuflaire and M. Gabriel},
journal= {arXiv preprint arXiv:1112.5961},
year = {2015}
}
Comments
4 pages, 2 figures. To be published in Astrophysics and Space Science Proceedings series (ASSP). Proceedings of the "20th Stellar Pulsation Conference Series: Impact of new instrumentation and new insights in stellar pulsations", 5-9 September 2011, Granada, Spain