Issue |
A&A
Volume 406, Number 1, July IV 2003
|
|
---|---|---|
Page(s) | L23 - L26 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20030856 | |
Published online | 17 November 2003 |
Letter to the Editor
Solar-like oscillations in the K1 dwarf star α Cen B*
Observatoire de Genève, 51 chemin de Maillettes, 1290 Sauverny, Switzerland
Corresponding author: F. Carrier, fabien.carrier@obs.unige.ch
Received:
12
May
2003
Accepted:
9
June
2003
The K1 dwarf α Cen B was observed with the Coralie spectrograph on the 1.2-m Swiss telescope at La Silla in April 2003. Thirteen nights of observations have made it possible to collect 3626 radial velocity measurements with a standard deviation of 1.4 m s-1 exhibiting a mean noise level in the amplitude spectrum of only 3.75 cm s-1. Twelve oscillation modes have been identified in the power spectrum between 3 and 4.6 mHz with amplitudes in the range 8.7 to 13.7 cm s-1 and showing a regularity with a large separation of 161.1 μHz. A preliminary discussion on the physical parameters of the α Cen binary system is presented.
Key words: stars: individual: α Cen B / stars: oscillations
© ESO, 2003
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