Do red giants have short mode lifetimes?

Details Do red giants have short mode lifetimes? Do red giants have short mode lifetimes?

2005-10-18

arxiv.org/abs/astro-ph/0510506v1

Mem.Soc.Ast.It.77:406-410,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 6 figures. Meeting on Stellar Pulsation and Evolution, June 2005, Rome. Proceedings to appear in "Memorie della Socie

Scientific paper

We show evidence that the red giant star ksi Hya has an oscillation mode
lifetime, tau, of about 2 days significantly shorter than predicted by theory
(tau = 17 days, Houdek & Gough 2002). If this is a general trend of red giants
it would limit the prospects of asteroseismology on these stars because of poor
coherence of the oscillations.

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