Volume 422, Number 1, July IV 2004
|Page(s)||247 - 252|
|Section||Stellar structure and evolution|
|Published online||06 July 2004|
Solar-like oscillations in Procyon A*
Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
Corresponding author: P. Eggenberger, Patrick.Eggenberger@obs.unige.ch
Accepted: 7 April 2004
The F5 subgiant Procyon A (α 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 μHz has been determined and twenty-three individual frequencies have been identified.
Key words: stars: oscillations / stars: individual: α Canis Minoris / techniques: radial velocities
© ESO, 2004
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