Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386l..17c&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. L17-L21.
Astronomy and Astrophysics
Astrophysics
13
Accretion Disks, Corona Borealis Constellation, Light Curve, Main Sequence Stars, Symbiotic Stars, Magnetohydrodynamics, Stellar Evolution, Stellar Models, Viscosity
Scientific paper
The hypothesis of Webbink (1976) that the accretion of a torus of matter onto a main-sequence star caused secondary maxima during the 1866 and 1946 eruptions of the recurrent nova T CrB is examined. Simple 1D calculations show that the accretion disk viscosity must increase with time to produce light curves resembling observations. It is inferred that the physical mechanism responsible for producing the viscous dissipation in the accretion disk has a fast growth rate and saturates to a viscosity parameter of order unity. The good agreement between parameters estimated from observations and those derived from a physical mechanism suggests that the growth rate instability identified by Balbus and Hawley (1991) is a promising source for accretion disk viscosity.
Cannizzo John Kendall
Kenyon Scott. J.
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