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Nodding motions of accretion rings and disks - A short-term period in SS 433It is pointed out that accretion disks and rings in mass transfer binaries have been observed spectroscopically and calculated theoretically for many years. The present investigation is partly based on the availability of several years of spectroscopic observations of the Doppler shifts of the moving lines in SS433. A formalism is presented to compute frequencies and amplitudes of short-term 'nodding' motions in precessing accretion disks in close binary systems. This formalism is applied to an analysis of the moving-line Doppler shifts in SS433. The 35d X-ray cycle of Hercules X-1 is also discussed. In the considered model, the companion star exerts a gravitational torque on the disk rim. Averaged over the binary orbit, this yields a steady torque which results in the mean driven counterprecession of the disk.
Document ID
19820061079
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Katz, J. I. (Washington Univ. Seattle, WA, United States)
Anderson, S. F. (Washington, University Seattle, WA, United States)
Grandi, S. A. (California, University Los Angeles, CA, United States)
Margon, B. (Washington Univ. Seattle, WA, United States)
Date Acquired
August 10, 2013
Publication Date
September 15, 1982
Publication Information
Publication: Astrophysical Journal
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF AST-81-21704
CONTRACT_GRANT: NSF AST-77-27745
Distribution Limits
Public
Copyright
Other