Issue |
A&A
Volume 390, Number 1, July IV 2002
|
|
---|---|---|
Page(s) | 205 - 212 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20020706 | |
Published online | 05 July 2002 |
The acoustic spectrum of α Cen A*
Observatoire de Genève, 51 chemin des Maillettes, 1290 Sauverny, Switzerland
Corresponding author: F. Bouchy, Francois.Bouchy@obs.unige.ch
Received:
17
January
2002
Accepted:
7
May
2002
This paper presents the analysis of Doppler p-mode observations of the G2V star α 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 μHz. A comparison with stellar models of α Cen A is presented.
Key words: stars: individual: α Cen A / stars: oscillations
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.