Radiation from Dwarf Nova Discs

Details Radiation from Dwarf Nova Discs Radiation from Dwarf Nova Discs

1998-06-04

arxiv.org/abs/astro-ph/9806065v1

Astronomy and Astrophysics

Astrophysics

To be published in Physics Reports, proceedings of the conference Astrophysical Fluids: From Atomic Nuclei to Stars and Galaxi

Scientific paper

10.1016/S0370-1573(98)00101-X

We use the Shaviv and Wehrse (1991) code to model the vertical structure and the emission properties of quiescent dwarf nova discs. We find that in the case of HT Cas the quiescent disc must be optically thin, in contradiction with the requirements of the standard disc instability model. We find a viscosity parameter alpha > 1. Although this is much less than values (~ 100) obtained in isothermal slab models it is not consistent with the accretion disc model assumptions.

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