The impact of differential rotation on the stochastic excitation of acoustic modes in solar-like stars

TL;DR

This paper investigates how differential rotation influences the stochastic excitation of acoustic modes in solar-like stars by developing a theoretical framework and using stellar modeling tools.

Contribution

It introduces a formalism for stochastic excitation considering differential rotation and assesses its impact using stellar evolution and pulsation codes.

Findings

Differential rotation modifies convective velocities affecting mode excitation.

Theoretical formalism links rotation profiles to acoustic mode amplitudes.

Results suggest rotation significantly influences mode amplitudes in solar-like stars.

Abstract

We model the stochastic excitation of acoustic modes in solar-like pulsators taking into account the action of differential rotation. We derive the theoretical formalism for the stochastic excitation with differential rotation and make use of rotating convection Mixing-Length Theory to assess how the convective velocity is modified by rotation. Finally, we use the stellar structure and evolution code MESA combined with the stellar pulsation code GYRE to compute acoustic modes amplitudes.