Novae Crossing the Thermal Stability Line

Details Novae Crossing the Thermal Stability Line Novae Crossing the Thermal Stability Line

1998-11-26

arxiv.org/abs/astro-ph/9811417v1

Astronomy and Astrophysics

Astrophysics

6 pages, Latex, 3 style files, to be published in the proceedings of ''Disk Instabilities in Close Binary Systems'', Kyoto, 27

Scientific paper

A method, based on the disc instability model, for testing the thermal stability of Cataclysmic Variables (CVs), is presented. It is shown that the border line between thermal stability and instability is crossed during some nova outbursts and decays, however it is not clear whether this is the general behaviour. We suggest two new evolutionary scenarios for short orbital period CVs. One of them is the analogy for the 'modified hibernation scenario' and the other is an extension of the ideas of Mukai and Naylor (1993) for long orbital period CVs. We conclude that the observations have not favoured one of the two models. Finally, we speculate the existence of a new type of nova - an AM CVn like nova.

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