Dwarf nova outbursts in truncated accretion discs: down with low alphas

Details Dwarf nova outbursts in truncated accretion discs: down with low alphas Dwarf nova outbursts in truncated accretion discs: down with low alphas

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.282..735w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 282, Issue 3, pp. 735-738.

Astronomy and Astrophysics

Astronomy

41

Accretion, Accretion Discs, Instabilities, Methods: Numerical, Methods: Observational, Novae, Cataclysmic Variables, White Dwarfs

Scientific paper

We show that the long recurrence time of the outbursts of WZ Sge can be reproduced by an outside-in instability, in a disc, the inner part of which is removed by the magnetic field of the white dwarf. Contrary to previous assertions, we demonstrate that an outburst interval of 30 yr does not require an anomalously low value for the viscosity parameter in quiescence, but rather it can be obtained with a standard value. Nor does it require an increased mass transfer to trigger the outbursts. A few observational tests of the proposed model are suggested.

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