Do red giants have short mode lifetimes?

D. Buzasi; D. Stello; H. Kjeldsen; T. R. Bedding

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Do red giants have short mode lifetimes?

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arxiv astro-ph/0510506 v1 pith:KNR2TXAY submitted 2005-10-18 astro-ph

D. Stello , H. Kjeldsen , T. R. Bedding , D. Buzasi This is my paper

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keywords daysgiantsmodeasteroseismologybecausecoherenceevidencegeneral

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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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