Energy of solar-like oscillations in red giants. Issue Volume 9:Issue S301(2013) (18th February 2014)

• Record Type: Journal Article
• Authors: Grosjean, Mathieu; Dupret, Marc-Antoine; Belkacem, Kevin; Montalbán, Josefina; Samadi, Reza
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S301(2013)
• Page Start: 341
• Page End: 344
• Publication Date: 2014-02-18
• Subjects: red giants, -- solar-like oscillations, -- mixed-mode lifetimes; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921313014555
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: CoRoT and Kepler observations of red giants reveal a large variety of spectra of nonradial solar-like oscillations. So far, we understood pretty well the link between the global properties of the star (radius, mass, evolutionary state) and the properties of the oscillation spectrum (Δν, νmax, period spacing). We are interested here in the theoretical predictions of two other components of a power spectrum, the mode linewidths and heights. The study of the energy of the oscillations is of great importance to predict the peak parameters in the power spectrum. We will discuss circumstances under which mixed modes are detectable for red-giant stellar models from 1 to 2 M ⊙, with emphasis on the effect of the evolutionary status of the star along the red-giant branch on theoretical power spectra.