Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000newar..44..105r&link_type=abstract
New Astronomy Reviews, Volume 44, Issue 1-2, p. 105-110.
Astronomy and Astrophysics
Astronomy
1
Scientific paper
I examine whether the observed scatter of the mass transfer rates among CVs of a given orbital period can be explained in terms of irradiation-driven mass transfer cycles. I show that, if such cycles work in CVs, they are characterized by an amplitude A and duty cycle d with Ad>1. On the other hand, as is demonstrated by means of a simple top hat model for the mass transfer variations, observational constraints require that Ad<1. Therefore, irradiation-driven mass transfer cycles are unlikely to be the cause of the observed scatter of the mass transfer rates. Furthermore, I examine whether the supersoft X-ray sources (SSSs) can be explained as ordinary CVs seen in a high state of an irradiation-driven mass transfer cycle. I argue that while it is possible to get a SSS in this way, this mechanism probably cannot account for a sizable fraction of the SSSs.
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