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Variable, Optically Thick, Hot Plasma Observed in Interacting Binaries*

Published online by Cambridge University Press:  12 April 2016

Y. Kondo
Affiliation:
Laboratory for Astronomy and Solar Physics, NASA-Goddard Space Flight Center, Greenbelt, Md., U.S.A.
G. E. McCluskey
Affiliation:
Division of Astronomy, Department of Mathematics, Lehigh University, Bethlehem, Pa., U.S.A.
S. B. Parsons
Affiliation:
Space Telescope Science Institute, Johns Hopkins University, Baltimore, Md., U.S.A.

Abstract

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We report recent International Ultraviolet Explorer (IUE) observations of two interacting binaries, R Arae and HD 207739. The ultraviolet spectra indicate the presence of optically-thick, variable hot plasma in those binary systems. These two binaries may belong to a class of binaries that are currently undergoing a rarely observed and probably short-lived phase in their evolution. Their properties are compared with those of two other interacting binaries, U Cephei and ß Lyrae.

Type
Research Article
Copyright
Copyright © Reidel 1984

Footnotes

*

Paper presented at the Lembang-Bamberg IAU Colloquium No. 80 on ‘Double Stars: Physical Properties and Generic Relations', held at Bandung, Indonesia, 3-7 June, 1983.

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