Oscillations on the star Procyon

Details Oscillations on the star Procyon Oscillations on the star Procyon

2005-10-11

arxiv.org/abs/astro-ph/0510303v1

Nature 432 (2004) 7015

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1038/nature03165

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.

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