On the nature of the 35-day cycle in HZ Her/Her X-1
published by Dmitry Kolesnikov
in 2021
in Physics
and research's language is
English
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Abstract in English
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.