Long-term variability of the 35-day cycle in Her X-1

Vladislav Revnivtsev, Konstantin Postnov, Ruediger Staubert +3

Her X-1 is an eclipsing X-ray binary system consisting of an accreting neutron star and an optical component HZ Her. In addition to the 1.24-s X-ray pulsations and the 1.7-d orbita…