Oscillation Frequency Spectra at Rapid Rotation

Abstract

We have computed pulsation frequencies for mid order p-modes for 2D models of rapidly rotating stars. Tracking down the evolution of a particular mode frequency as a function of rotational velocity from zero to breakup speeds allows us to identify the modes at fast rotation, and potentially one can use this relationship as a discriminant for mode identification. We also address the question of how reliably we can obtain the large separation from the computed spectrum, and what happens to the small separation as a function of rotation.