On the nature of the 35-day cycle in HZ Her/Her X-1
N. I. ShakuraD. A. KolesnikovK. A. Postnov
所有作者
N. I. ShakuraD. A. KolesnikovK. A. Postnov
文献摘要
Regular variations of the pulse period of Her X-1 with X-ray flux observed by
Fermi-GBM are examined. We argue that these regular variations result from the
free precession of the neutron star in Her X-1.