Poster abstract details

We present results of our 5-years-long program of ground-based spectroscopic and photometric observations of Kepler asteroseismic targets.

For more than 100 stars for which we acquired high-resolution spectra, we determined the Teff, logg, [Fe/H], the projected velocity of rotation, and the radial velocity. We put these stars in the log Teff - log g diagram and discuss the derived atmospheric parameters by comparing them with the information available from the Kepler Input Catalogue.

For 19 stars from the Kepler field of view which lie in the distance ranging from 15 to 240 pc, we measured the interstellar reddening that we found to be negligible.

Then, we show the results of our time-series multicolour photometric observations of NGC 6866 which is one of the four open clusters in the Kepler field of view. In this cluster, we discovered three $\delta$ Sct and two $\gamma$ Dor pulsators that are on the list of Kepler asteroseismic targets, as well as 14 other variables of different type.

Finally, we discuss the occurrence of $\gamma$ Dor stars in the medium-age and old open clusters of different metallicity.