2004A&A...415..231K

High-resolution spectroscopic observations around the H_α line and BVRI photometry of the eclipsing short-period RS CVn star WY Cnc are presented. The solutions of our radial velocity curves and light curves yielded the following values for masses and radii of the components: M₁=0.84M_☉, M₂=0.46M_☉, R₁=1.06R_☉, R₂=0.65R_☉. The measured rotational broadenings of the spectral lines correspond to equatorial velocities V₁=78km/s and V₂=49km/s. The distortions of our multicolor light curve of WY Cnc were reproduced by two cool spots on the primary star. An increase of the out-of-eclipse brightness by 0.1mag in February 2001 was detected. Our spectra show H_α line in emission from the secondary star. The chromospheric activity appeared also in the observed emission cores of the CaII H and K lines as well as the CaI 6494 line.