Issue |
A&A
Volume 429, Number 1, January I 2005
|
|
---|---|---|
Page(s) | L17 - L20 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:200400106 | |
Published online | 13 December 2004 |
Letter to the Editor
Asteroseismology of Procyon A with SARG at TNG*
1
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: leccia@na.astro.it;lpaterno@ct.astro.it
4
McDonald Observatory, The university of Texas at Austin, Austin, TX 78712, USA e-mail: mike@astro.as.texas.edu
Received:
1
October
2004
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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