Identifying pulsation modes from two-passband photometry

TL;DR

This paper explores how two-passband photometry, combined with radial velocity data, can improve the identification of pulsation modes in main sequence variable stars, aiding stellar characterization.

Contribution

It demonstrates the potential of using photometric diagnostic diagrams and spectroscopy to enhance mode identification and constrain stellar parameters.

Findings

Photometric diagrams help distinguish pulsation modes.

Radial velocity data improves mode discrimination.

Combined observations refine stellar models.

Abstract

I discuss a prospect for mode identification from two-passband photometry of forthcoming BRITE space mission. Examples of photometric diagnostic diagrams are shown for three types of main sequence pulsating variables: $\beta$ Cephei, Slowly Pulsating B-type and $\delta$ Scuti stars. I consider also taking into account the radial velocity data from simultaneous spectroscopy, which can be carried out from the ground. With such observations, much better discrimination of the spherical harmonic degree, $\ell$, can be accomplished and more constraints on stellar parameters and input physics can be derived.