Spectroscopic eclipse mapping of oEA stars

We present results of a first application of a new computer program for modeling spectroscopic line profiles of eclipsing binaries including eclipse mapping. We apply the program to observed spectra of the oEA star RZ Cas. Basic stellar parameters of RZ Cas are derived from an optimization of the model parameters and compared to those derived from the light curves using the Wilson-Devinney code. Results are in a very good agreement. The comparison of the O-C values obtained from the spectra taken in 2001 and in 2006 support the assumption that a transient phase of rapid mass-transfer occurred in RZ Cas near to the year 2001.