Paper: astro-ph/0510303
Date: Tue, 11 Oct 2005 05:49:04 GMT (467kb)

Title: Oscillations on the star Procyon

Authors: Francois Bouchy (LAM), Andre Maeder, Michel Mayor, Denis Megevand,
Francesco Pepe, Danuta Sosnowska

Proxy: ccsd ccsd-00011135

Journal-ref: Nature 432(7015) (2004) 2

DOI: 10.1038/nature03165
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Stars are sphere of hot gas whose interiors transmit acoustic waves very
efficiently. Geologists learn about the interior structure of Earth by
monitoring how seismic waves propagate through it and, in a similar way, the
interior of a star can be probed using the periodic motions on the surface that
arise from such waves. Matthews et al. claim that the star Procyon does not
have acoustic surface oscillations of the strength predicted. However, we show
here, using ground-based spectroscopy, that Procyon is oscillating, albeit with
an amplitude that is only slightly greater than the noise level observed by
Matthews et al. using spaced-based photometry.

\\ ( http://arXiv.org/abs/astro-ph/0510303 , 467kb)