The viscosity-surface density relation and implications for the early rise of dwarf novae outbursts

Details The viscosity-surface density relation and implications for the early rise of dwarf novae outbursts The viscosity-surface density relation and implications for the early rise of dwarf novae outbursts

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...175..113m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 175, no. 1-2, March 1987, p. 113-116.

Astronomy and Astrophysics

Astrophysics

22

Accretion Disks, Cataclysmic Variables, Density (Mass/Volume), Dwarf Novae, Stellar Temperature, Viscosity, Magnetohydrodynamic Stability, Plasma Heating, Surface Properties, Temperature Distribution

Scientific paper

The author presents results of new computations of the vertical structure of accretion disks in dwarf novae. The range of uncertainty in the results due to differences in low temperature opacities is determined. From the shape of the lower branch of the viscosity-surface density relation one may predict the effective temperatures expected during the early rise of an outburst due to an accretion disk instability. It is shown that temperatures around 6000 - 7000K as observed for VW Hydri are well explained by the disk instability model.

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