A&A 422, 247-252 (2004)
DOI: 10.1051/0004-6361:20040148

Solar-like oscillations in Procyon A

P. Eggenberger, F. Carrier, F. Bouchy and A. Blecha

Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland

(Received 9 Mai 2003 / Accepted 7 April 2004)

Abstract
The F5 subgiant Procyon A ( CMi, HR 2943) was observed with the CORALIE fiber-fed echelle spectrograph on the 1.2-m Swiss telescope at La Silla in February 1999. The resulting 908 high-accuracy radial velocities exhibit a mean noise level in the amplitude spectrum of 0.11 m s ^-1 at high frequency. These measurements show significant excess in the power spectrum between 0.6-1.6 mHz with 0.60 m s ^-1 peak amplitude. An average large spacing of 55.5  Hz has been determined and twenty-three individual frequencies have been identified.

Key words: stars: oscillations -- stars: individual: Canis Minoris -- techniques: radial velocities

Offprint request: P. Eggenberger, Patrick.Eggenberger@obs.unige.ch

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© ESO 2004

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