Talk abstract details

We report on the ground-based follow-up program of spectroscopic and
photometric observations of stars selected for solar-like asteroseismic
targets for Kepler. These stars constitute a large group of several
thousand objects which are a subject of an intensive study of the KASC
Working Group number 1 (WG-1).

We present results of a literature search for atmospheric parameters of
these stars performed by the members of the WG-1, and we show that only
a small fraction of the total number of our targets has ever been
mentioned in the literature.

Then, we compare the information on the stars' atmospheric parameters
collected from the literature, with the values of Teff, log g and [Fe/H]
available from the Kepler Input Catalogue (KIC). We show that since the
precision of the atmospheric parameters in the KIC is not sufficient for
the asteroseismic purposes, we need a coordinated, long-term observing
program that would allow to derive atmospheric parameters for all stars
listed as 'Solar-Like Oscillators' by the KASC.

Finally, we discuss the internal and external precision of the
atmospheric parameters derived by means of different methods for same
star and from the same data, and then, discrepancies that occur in Teff
and log g when these parameters are derived for the same star from
spectroscopic and photometric observations. Since in some particular
cases these discrepancies can be significant and their origin is not
always clear, we emphasise the need of explaining the reason of that
phenomenon.