Volume 418, Number 1, April IV 2004
|Page(s)||295 - 303|
|Section||Stellar structure and evolution|
|Published online||02 April 2004|
p-mode frequencies in solar-like stars*
I. Procyon A
Service d'Aéronomie du CNRS, BP 3, 91371 Verrières le Buisson, France
2 Science Payload and Advanced Concept Office of ESA, ESTEC, AG Noordwijk, 2200, The Netherlands
3 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA-02138, USA
Corresponding author: M. Martić, firstname.lastname@example.org
Accepted: 27 January 2004
As a part of an on-going program to explore the signature of p-modes in solar-like stars by means of high-resolution absorption line spectroscopy, we have studied four stars (α CMi, η Cas A, ζ Her A and β Vir). We present here new results from two-site observations of Procyon A acquired over twelve nights in 1999. Oscillation frequencies for and 0 (or 2) p-modes are detected in the power spectra of these Doppler shift measurements. A frequency analysis points out the difficulties of the classical asymptotic theory in representing the p-mode spectrum of Procyon A.
Key words: stars: oscillations (including pulsations) / stars: individual: Procyon A / techniques: radial velocities
© ESO, 2004
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