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Title of article :
Solar-like oscillations in the K1 dwarf star (alpha) Cen B
Author/Authors :
Carrier، F. نويسنده , , Bourban، G. نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
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Abstract :
The K1 dwarf (alpha) 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 (mu) Hz. A preliminary discussion on the physical parameters of the (alpha) Cen binary system is presented.
Keywords :
stars: individual: (alpha) Cen B , stars: oscillations
Journal title :
Astronomy and Astrophysics
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Link To Document :