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A model for the X-ray nova A0620-00The model involves 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. It was concluded that A0620-00 can provide an excellent test case for numerical models of stellar atmospheres irradiated by an external X-ray flux.
Document ID
19760011930
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Endal, A. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Devinney, E. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Sofia, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
March 1, 1976
Subject Category
Astronomy
Report/Patent Number
X-671-76-42
NASA-TM-X-71074
Report Number: X-671-76-42
Report Number: NASA-TM-X-71074
Accession Number
76N19018
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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