Photometric amplitudes and phases of B-type main sequence pulsators: sources of inaccuracy

TL;DR

This paper investigates the various sources of uncertainties affecting the theoretical photometric amplitudes and phases of B-type main sequence pulsators, emphasizing the impact of stellar parameters and atmospheric models.

Contribution

It provides a comprehensive analysis of how chemical composition, opacities, and NLTE atmospheres influence theoretical pulsation observables.

Findings

Chemical composition significantly affects amplitude predictions.

Opacity variations alter phase calculations.

NLTE atmospheres introduce notable uncertainties.

Abstract

We discuss all possible sources of uncertainties in theoretical values of the photometric amplitudes and phases of B-type main sequence pulsators. These observables are of particular importance because they contain information about the mode geometry as well as about stellar physics. Here, we study effects of various parameters coming both from theory of linear nonadiabatic oscillations and from models of stellar atmospheres. In particular, we show effects of chemical composition, opacities and, for the first time, effects of the NLTE atmospheres.