Precessing twisted accretion disks, with an application to Hercules X-1

Details Precessing twisted accretion disks, with an application to Hercules X-1 Precessing twisted accretion disks, with an application to Hercules X-1

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..255m&link_type=abstract

Astrophysical Journal, Part 1, vol. 236, Feb. 15, 1980, p. 255-262.

Astronomy and Astrophysics

Astrophysics

24

Binary Stars, Precession, Stellar Mass Accretion, X Ray Stars, Disks (Shapes), Eigenvalues, Periodic Variations, Viscosity

Scientific paper

An eigenvalue equation is derived for the steady-state precession frequency of a twisted, thin accretion disk in a binary system. An algorithm which solves this equation by time-evolution of the twisted disk equations is described. Applying the parameters of the X-ray binary Her X-1, and assumming that the 35 day cycle of that system is due to periodic obscuration by a precessing disk, it is found that the observations place severe restrictions on the possible values of the viscosity in the disk.

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