Prospects for asteroseismology of rapidly rotating B-type stars

TL;DR

This paper explores how rapid rotation affects stellar oscillations, focusing on g- and r-modes, and compares theoretical predictions with observations of Be stars to enhance understanding of stellar interiors.

Contribution

It analyzes the impact of rotation on oscillation modes and compares theoretical models with observations, advancing asteroseismology of rapidly rotating B-type stars.

Findings

Frequency groupings linked to azimuthal order m in g- and r-modes

Comparison of theoretical spectra with Be star observations

Insights into the effects of rotation on stellar oscillations

Abstract

In rapidly rotating stars Coriolis forces and centrifugal deformations modify the properties of oscillations; the Coriolis force is important for low-frequency modes, while the centrifugal deformation affects mainly p-modes. Here, we discuss properties of g- and r-mode oscillations in rotating stars. Predicted frequency spectra of high-order g-modes (and r-modes) excited in rapidly rotating stars show frequency groupings associated with azimuthal order $m$. We compare such properties with observations in rapidly rotating Be stars, and discuss what is learnt from such comparisons.