%0 Journal Article
%A Fernández Figueroa, María José
%A Sedano, J. L.
%A Castro Rubio, Elisa De
%T The Mg II emission in a sample of regular-period RS CVn systems
%D 1986
%@ 0004-6361
%U https://hdl.handle.net/20.500.14352/64986
%X We have studied a sample of ten RS CVn systems by means of IUE high resolution long wavelength spectra. A general trend toward decreasing chromospheric activity (R_hk) for slower rotating stars has been found. Considering the R_hk values and their relation with structural parameters (T_eff, logg, log P_rot) we suggest that there are two pos­sible different activity levels. The less active systems have Rhk chromospheric activity levels similar to the single cool stars showing the same general trend. A relation between R_hk and the inverse Rossby number has been obtained, in which the RS CVn stars fill the gap found by Rucinski between W UMa and the main-sequence stars.
%~