Instrument developments for asteroseismology at Dome-C

¹ University LA SAPIENZA of Rome, Solar Physics Laboratory, Italy
² Osservatorio Astronomico, Brera, Milan-Merate, Italy;

Corresponding authors: alessandro.cacciani@roma1.infn.it elio@merate.mi.astro.it

Abstract

Helioseismology and Asteroseismology have already given important contributions to stellar astrophysics, and they provide a powerful diagnostic method to improve our knowledge about the interior and evolution of star. Some experimental problems, however, such as the atmospheric scintillation, affect the precision of the measurements we can achieve. This kind of noise can ultimately be eliminated only through space-based observation, at the expense of high organization and financial costs. In the framework of a collaboration between the Solar Physics Laboratory (G28) of University of Rome La Sapienza and the Brera Astronomical Observatory of Milan-Merate, an experimental set-up has been developed to increase the signal to noise ratio of our photometric observations and reduce the scintillation noise. This system appears to be a great help in observational asteroseismology as it strongly rejects the scintillation noise while amplifies the stellar signals. Dome-C would be the best ground based site for our measurements because of its low scintillation noise level and high atmospheric stability.