Impact of uniform rotation on the stochastic excitation of acoustic modes in solar-like oscillators

TL;DR

This paper investigates how uniform rotation affects the excitation and amplitude of acoustic modes in solar-like stars, revealing that rotation inhibits mode amplitudes through modified convective velocities.

Contribution

It introduces a comprehensive framework combining wave equations, source term calculations, and stellar modeling to quantify rotation's impact on mode excitation.

Findings

Rotation inhibits mode amplitudes in solar-like oscillators.

Coriolis acceleration modifies convective velocities.

Mode excitation is reduced by uniform stellar rotation.

Abstract

We evaluate the impact of the rotation on the stochastic excitation of acoustic (p) modes in solar-like pulsators. First, we derive the forced wave equation taking rotation into account and we compute the source terms, which inject energy into the oscillations. We make use of the Rotating Mixing Length Theory (R-MLT) to assess how the convective root mean square velocities are modified by the Coriolis acceleration. Finally, we use the stellar structure and evolution code MESA combined with the stellar pulsation code GYRE to show that the resulting modes amplitudes are inhibited by rotation.