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On the observational appearances of a freely precessing neutron star in Hercules X-1Evidence for neutron star free precession is discussed, which is often presumed to be responsible for the observed 35-day cycle in Hercules X-1. The precise formula for the period derivative due to free precession is obtained under assumption that the precession period is much longer than that of the neutron star rotation. The optical light curves to be seen from the binary, with freely precessing accretion neutron star are simulated numerically. This simulation takes into account the reflection effect on the surface of the secondary component and on the accretion disk itself for different diagrams of x-ray emission.
Document ID
19920003745
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Postnov, K. A.
(Academy of Sciences (USSR) Moscow, Ussr)
Prokhorov, M. E.
(Academy of Sciences (USSR) Moscow, Ussr)
Shakura, N. I.
(Academy of Sciences (USSR) Moscow, Ussr)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: NAS-NRC, High-Energy Astrophysics. American and Soviet Perspectives
Subject Category
Astrophysics
Accession Number
92N12963
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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