Variable,optically thick,hot plasma observed in interacting binaries |
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| Authors: | Y. Kondo G. E. McCluskey S. B. Parsons |
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| Affiliation: | (1) Laboratory for Astronomy and Solar Physics, NASA-Goddard Space Flight Center, Greenbelt, Md., USA;(2) Division of Astronomy, Department of Mathematics, Lehigh University, Bethlehem, Pa., USA;(3) Space Telescope Science Institute, Johns Hopkins University, Baltimore, Md., USA |
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| Abstract: | 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  Lyrae.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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