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Title:
p-mode frequencies in solar-like stars. I. Procyon A
Authors:
Martić, M.; Lebrun, J.-C.; Appourchaux, T.; Korzennik, S. G.
Affiliation:
AA(Service d'Aéronomie du CNRS, BP 3, 91371 Verrières le Buisson, France), AB(Service d'Aéronomie du CNRS, BP 3, 91371 Verrières le Buisson, France), AC(Science Payload and Advanced Concept Office of ESA, ESTEC, AG Noordwijk, 2200, The Netherlands), AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA-02138, USA)
Publication:
Astronomy and Astrophysics, v.418, p.295-303 (2004) (A&A Homepage)
Publication Date:
04/2004
Origin:
A&A
Astronomy Keywords:
stars: oscillations (including pulsations), stars: individual: Procyon A, techniques: radial velocities
DOI:
10.1051/0004-6361:20034574
Bibliographic Code:
2004A&A...418..295M

Abstract

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 l=1 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.

Based on observations obtained at the Observatoire de Haute-Provence (CNRS, France) and at the Whipple Observatory (Arizona, USA).

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