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Astron. Astrophys. 322, 841-845 (1997)

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The nature and applications of an irradiation ionization front in cataclysmic variables

Juntao Yuan and Zongyun Li

Department of Astronomy, Nanjing University, Nanjing 210093, P.R.China (zyli@nju.edu.cn)

Received 18 June 1996 / Accepted 18 November 1996


In order to explain the photometric oscillations of several minutes observed in CVs, A.R.King proposed a model based on the nature of IF on the irradiated surface of the secondary in 1989. Having carefully studied King's theory, we propose a revised version of King's theory in this paper and get some results quite different from King's. The upper limit of oscillation period is found to be much larger than [FORMULA] and it can vary in a wide scope in real cases in stead of being strictly at [FORMULA]. And our further calculations rule out the application of this mechanism to any disk-feed system including dwarf novae in outbursts.

Key words: accretion, accretion disks – novae, cataclysmic variables – stars: atmospheres

Send offprint requests to: Juntao Yuan

© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998