Constraints on model atmospheres from complex asteroseismology of the \beta Cephei stars

TL;DR

This study uses complex asteroseismology to compare LTE and NLTE model atmospheres of eta Cephei stars, providing constraints on atmospheric effects through pulsation data analysis.

Contribution

It introduces a method to simultaneously fit pulsational frequencies and the complex parameter f to test LTE and NLTE atmosphere models for eta Cephei stars.

Findings

NLTE models better match observed pulsation data

Constraints on atmospheric effects from pulsation analysis

Comparison of LTE and NLTE model performance

Abstract

Using the method termed complex asteroseismology, we derive constraints on model atmospheres, in particular, on the NLTE effects. We fit simultaneously pulsational frequencies and the corresponding values of the nonadiabatic complex parameter f for the four \beta Cephei stars: \theta Oph, \nu Eri, \gamma Peg and 12 Lac. The LTE Kurucz models and the BSTAR2006 NLTE models are tested.