Hercules X-1 = HZ Herculis - A multiperiod variable

Details Hercules X-1 = HZ Herculis - A multiperiod variable Hercules X-1 = HZ Herculis - A multiperiod variable

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219..605w&link_type=abstract

Astrophysical Journal, Part 1, vol. 219, Jan. 15, 1978, p. 605-612.

Astronomy and Astrophysics

Astrophysics

18

Binary Stars, Periodic Variations, Stellar Models, Variable Stars, X Ray Stars, Beat Frequencies, Mass Transfer, Stellar Rotation, Uhuru Satellite

Scientific paper

Fundamental rotation properties of the free modes of oscillation of a star are employed to account for the various periodicities observed in the X-ray binary system HZ Her/Her X-1. The various rotation rates may be taken as defining a set of beat periods associated with the quasiregular flareups of HZ Her. This analysis, involving only one free parameter, provides a single physical mechanism to explain five observed periods of the binary system, including periods of 1.7 days, 35 days and 10 to 12 years.

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