NEW H-ALPHA SURVEY OF CHROMOSPHERICALLY ACTIVE BINARIES

We had observed the high-resolution Ha profiles of fourteen chromospherically active binaries which are eta And, 3 Cam, 4 UMi, nu2 Sgr, tau Sgr, HR 7333,33 Psc, epsilon UMi, lambda And, xi UMa, 12 Cam, zeta And, alpha Aur and omicron Dra from August 1990 to August 1991. The Halpha emission and absorption equivalent widths, and the half widths and the radial velocities of these systems were determined. These data have a good supply for the information of the catalog of chromospherically active binary stars. The Halpha profiles of HR 7333, 12 Cam, 4 UMi, epsilon UMi and lambda And show marked emission filling in core, but 33 Psc, tau Sgr, tau Sgr and eta And systems show the Halpha as the stronger absorption lines. The observed fourteen binaries presented very different activity levels.