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A model for the X-ray nova A0620-00A 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.
Document ID
19760055842
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Endal, A. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Devinney, E. J. (NASA Goddard Space Flight Center Laboratory for Optical Astronomy, Greenbelt, Md., United States)
Sofia, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Publication Information
Publication: Astrophysical Letters
Volume: 17
Issue: 3, 19
Subject Category
Astrophysics
Accession Number
76A38808
Distribution Limits
Public
Copyright
Other

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