Stream overflow and dwarf nova eruptions

Details Stream overflow and dwarf nova eruptions Stream overflow and dwarf nova eruptions

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.301..626s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 301, Issue 3, pp. 626-630.

Astronomy and Astrophysics

Astronomy

8

Accretion, Accretion Discs, Hydrodynamics, Binaries: Close, Novae, Cataclysmic Variables

Scientific paper

We consider the effects of accretion stream overflow on the viscous dynamics of accretion discs in dwarf novae. If the stream from the secondary star is geometrically thick enough, some fraction of its material can flow over and under the disc. The mass and specific angular momentum of the stream are then deposited not only at the point of collision with the outer disc, but also at those radii in the inner disc with geometric heights that are large enough to intercept the residual stream, or near the radius where the disc has the same specific angular momentum as the stream. The overflowing stream can alter the behaviour of heating fronts and cooling fronts in the disc. If the mass fraction of the overflowing stream is of order tens of per cent, the deposition of mass in the inner parts of the disc is sufficient to change the character of the eruption light curves significantly.

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