Periodic mass transfer in Hercules X-1/HZ Herculis

Details Periodic mass transfer in Hercules X-1/HZ Herculis Periodic mass transfer in Hercules X-1/HZ Herculis

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...235..999c&link_type=abstract

Astrophysical Journal, Part 1, vol. 235, Feb. 1, 1980, p. 999-1015.

Astronomy and Astrophysics

Astrophysics

119

Binary Stars, Mass Transfer, Stellar Mass Accretion, Stellar Spectra, X Ray Sources, X Ray Spectra, Boundary Value Problems, Light Curve, Orbital Elements, X Ray Absorption

Scientific paper

The paper considers various features in the X-ray light curve of Her X-1, primarily pre-eclipse and anomalous dips, 0.3 and 0.7 orbital phase turn-ons, as aspects of only a single process of periodic mass transfer in this system. It is shown that the present analysis also leads to an estimation of a number of parameters related to mass transfer and accretion, including a fourth fundamental periodicity observed in this system; the circulation time of matter at the disk rim. It is concluded that mass transfer episodes appear to be correlated with the periodic passage of the X-ray shadow of the tilted accretion disk over the most strongly heated portion of HZ Herculis.

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