Cataclysmic variables: gladiators in the arena

Details Cataclysmic variables: gladiators in the arena Cataclysmic variables: gladiators in the arena

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002msngr.109...41m&link_type=abstract

The Messenger (ISSN 0722-6691), No. 109, p. 41 - 46 (September 2002)

Physics

1

Cataclysmic Variables, Dwarf Novae, Outbursts

Scientific paper

Here we present some results of our recent research in the area of dwarf novae, a subclass of cataclysmic variables showing semi-regular outbursts in time scales of days to years with typical amplitudes of 2-6 mags. The origin of these dwarf-nova outbursts is not a thermonuclear runaway as in the case of a nova outburst, but a sudden jump in disc viscosity and mass transfer rate as a result of the hydrogen ionization. In this article we do not go into deep details. Instead, we will illustrate the application of some standard techniques in the field of CVs aimed to explore disc dynamics and also to reveal the nature of the donor star. The latter point is especially important to constrain theories of CV evolution.

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