Towards precise asteroseismology of solar-like stars

TL;DR

This paper investigates how incorporating time-dependent convection in non-adiabatic models enhances the precision of asteroseismic modeling of solar-like stars, reducing acceptable solutions and improving fit accuracy.

Contribution

It introduces a theoretical approach using time-dependent convection to improve frequency precision in stellar models, addressing near surface effects.

Findings

Reduced number of acceptable models with improved constraints

Achieved good agreement with seismic observables for beta Hydri

Enhanced model fitting accuracy by including convection-pulsation interaction

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.