Journal
ASTRONOMY & ASTROPHYSICS
Volume 422, Issue 1, Pages 247-252Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20040148
Keywords
stars : oscillations; stars : individual : alpha Canis Minoris; techniques : radial velocities
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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 muHz has been determined and twenty-three individual frequencies have been identified.
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