NASA NTRS · 19760055842
A model for the X-ray nova A0620-00
Abstract
A model is proposed for the transient X-ray source A0620-00 involving a white dwarf accreting mass from a late-type subgiant companion. The transient behavior of the X-ray source is explained by the instability to mass loss of the companion (as in Algol-type binaries). The brightening, spectrum, and decay timescale of the optical counterpart are explained in terms of re-emission of X-radiation intercepted by the subgiant. A0620-00 should provide an excellent test case for numerical models of stellar atmospheres irradiated by an external X-ray flux.
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Endal, A. S., Devinney, E. J., Sofia, S.. 1976-01-01. A model for the X-ray nova A0620-00. https://ntrs.nasa.gov/citations/19760055842
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