Oscillations on the star Procyon

François Bouchy (), André Maeder, Michel Mayor, Denis Mégevand, Francesco Pepe and Danuta Sosnowska
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François Bouchy: Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP8
André Maeder: Observatoire de Genève
Michel Mayor: Observatoire de Genève
Denis Mégevand: Observatoire de Genève
Francesco Pepe: Observatoire de Genève
Danuta Sosnowska: Observatoire de Genève

Nature, 2004, vol. 432, issue 7015, 2-2

Abstract: Abstract Arising from: J. M. Matthews et al. Nature 430, 51–53 (2004) Stars are spheres 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 predicted1. 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.

Date: 2004
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DOI: 10.1038/nature03165

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