Solar-like oscillations in Procyon A

Details Solar-like oscillations in Procyon A Solar-like oscillations in Procyon A

2005-01-14

arxiv.org/abs/astro-ph/0501271v1

Astron.Astrophys. 422 (2004) 247-252

Astronomy and Astrophysics

Astrophysics

A&A accepted

Scientific paper

10.1051/0004-6361:20040148

The F5 subgiant Procyon A (alpha CMi, HR 2943) was observed with the Coralie fiber-fed echelle spectrograph on the 1.2-m Swiss telescope at La Silla in February 1999. The resulting 908 high-accuracy radial velocities exhibit a mean noise level in the amplitude spectrum of 0.11 m s^-1 at high frequency. These measurements show significant excess in the power spectrum between 0.6-1.6 mHz with 0.60 m s^-1 peak amplitude. An average large spacing of 55.5 uHz has been determined and twenty-three individual frequencies have been identified.

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