Volume 429, Number 1, January I 2005
|Page(s)||L17 - L20|
|Published online||13 December 2004|
Letter to the Editor
Asteroseismology of Procyon A with SARG at TNG*
INAF – Oss. Astronomico di Padova, Vicolo Osservatorio 5, 35122 Padova, Italy e-mail: [claudi;desidera;gratton]@pd.astro.it
2 INAF – Oss. Astrofisico di Catania, via S. Sofia 78, 95123 Catania, Italy e-mail: [abo;rve;rco]@ct.astro.it
3 Dipartimento di Fisica ed Astronomia, Università di Catania, via S. Sofia 78, 95123 Catania, Italy e-mail: email@example.com;firstname.lastname@example.org
4 McDonald Observatory, The university of Texas at Austin, Austin, TX 78712, USA e-mail: email@example.com
Accepted: 17 November 2004
We present high precision radial velocity measurements on the F5 IV star α 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 . 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 [CITE]. An excess of power between 0.5 and 1.5 mHz, detected also by [CITE] has been found. We determined a large separation frequency , consistent with both theoretical estimates [CITE] and previous observations [CITE].
Key words: asteroseismology / solar-like oscillations / Procyon A / techniques: radial velocities
© ESO, 2005
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