A&A 390, 205-212 (2002)
The acoustic spectrum of Cen AF. Bouchy and F. Carrier
Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland
(Received 17 January 2002 / Accepted 7 May 2002)
This paper presents the analysis of Doppler p-mode observations of the G2V star Cen A obtained with the spectrograph CORALIE in May 2001. Thirteen nights of observations have made it possible to collect 1850 radial velocity measurements with a standard deviation of about 1.5 m s -1. Twenty-eight oscillation modes have been identified in the power spectrum between 1.8 and 2.9 mHz with amplitudes in the range 12 to 44 cm s -1. The average large and small spacing are respectively equal to 105.5 and 5.6 Hz. A comparison with stellar models of Cen A is presented.
Key words: stars: individual: Cen A -- stars: oscillations
Offprint request: F. Bouchy, Francois.Bouchy@obs.unige.ch
© ESO 2002