Asteroseismology of Procyon A with SARG at TNG

Abstract

We present high precision radial velocity measurements on the F5 IV star alpha CMi obtained by the SARG spectrograph at TNG (Telescopio Nazionale Galileo) exploiting the iodine cell technique. The time series of about 950 spectra of Procyon A taken during 6 observation nights are affected by an individual error of 1.3 m/s. Thanks to the iodine cell technique, the spectrograph contribution to the Doppler shift measurement error is quite negligible and our error is dominated by the photon statistics Brown et al 1994. An excess of power between 0.5 and 1.5 mHz, detected also by Martic et al. 2004 has been found. We determined a large separation frequency Delta nu0 = 56\pm 2 microHz, consistent with both theoretical estimates Chaboyer et al. 1999 and previous observations Martic et al. 2004.

arXiv comment4 pages, 5 figures, accepted to be published in A&A Letters

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Cited by in corpus (9)

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• The non-detection of oscillations in Procyon by MOST: is it really a surprise?
• Detection of solar-like oscillations in the G5 subgiant mu-Herculis
• Asteroseismology of Procyon with SOPHIE
• Seismology of Procyon A: determination of mode frequencies, amplitudes, lifetimes, and granulation noise
• Seismic inference of differential rotation in Procyon A
• Astrophysics in 2005
• Oscillations in Procyon A: First results from a multi-site campaign