Indirect evidence for short period magnetic cycles in W UMa stars

T. Borkovits, M. M. Elkhateeb, Sz. Csizmadia +4

Complex period variations of five W UMa type binaries (AB And, OO Aql, DK Cyg, V566 Oph, U Peg) were investigated by analyzing their O--C diagrams, and several common features were…