Spectral synthesis analysis and radial velocity study of the northern   F-, G-, and K-type flare-stars
  In this publication we present a study of the general physical, chemical properties and radial velocity monitoring of young active stars. We derive temperatures, log g, [Fe/H], v sin i, and R_{spec} values for eight stars. The detailed analysis reveals that the stars are not as homogeneous in their premier physical parameters as well as in the age distribution. In 4/5 we found a periodic radial velocity signal which origins in surface features the fifth is surprisingly inactive and shows little variation. 
B. K\"onig, E.W. Guenther, M. Esposito, A. Hatzes