ASTEROSEISMOLOGY OF PROCYON A WITH SARG AT TNG

摘要

We present the high precision radial velocity measurements on the F5 IV Star αCMi obtained from the SARG spectrograph at TNG (Telescopio Nazionale Galileo) exploiting the iodine cell technique. The time series of 950 analyzed spectra taken during 6 nights of Procyon observation, shows individual measurement error of 1.3 m/s (very close to the theoretical photon noise limit Brown et al. (1994)). An excess of power between 0.5 and 1.5 mHz, detected also by Martic et al. (2004) is found, but additional structure in the periodogram show up around 2.0 mHz.