Non-radial, non-adiabatic solar-like oscillations in RGB and HB stars

TL;DR

This paper compares theoretical oscillation spectra of two red giants in different evolutionary stages, using observations from CoRoT and Kepler to analyze their internal structures through non-radial, non-adiabatic solar-like oscillations.

Contribution

It provides the first results on inertia, lifetimes, and amplitudes of oscillations in red giants at different evolutionary phases.

Findings

Differences in oscillation properties between RGB and HB stars.

Theoretical spectra match observed rich non-radial oscillation spectra.

Insights into internal structure variations across evolutionary stages.

Abstract

CoRoT and Kepler observations of red giants reveal rich spectra of non-radial solar-like oscillations allowing to probe their internal structure. We compare the theoretical spectrum of two red giants in the same region of the HR diagram but in different evolutionary phases. We present here our first results on the inertia, lifetimes and amplitudes of the oscillations and discuss the differences between the two stars.