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Astrophysics and Space Science

, Volume 38, Issue 2, pp 353–358 | Cite as

High temperature plasma inβ Lyrae, observed fromCopernicus

  • Yoji Kondo
  • Margherita Hack
  • John B. Hutchings
  • George E. McCluskeyJr.
  • Miroslav Plavec
  • Ronald S. Polidan
Article

Abstract

High-resolution ultraviolet spectrophotometry of the complex close binary systemβ Lyrae was performed with the Princeton Telescope Spectrometer onCopernicus. Observations were made at phases 0.0, 0.25, 0.5, and 0.75 with the resolution of 0.2 Å (far-ultraviolet) and 0.4 Å (mid-ultraviolet). The far-ultraviolet spectrum is completely dominated by emission lines indicating existence of high temperature plasma in this binary. The spectrum ofthis object is unlike any other object observed fromCopernicus. It is believed that this high temperature plasma results from dynamic mass transfer taking place in this binary. The current results are compared with the OAO-2 Wisconsin Experiment Package observations and other observational results. The possibility that the secondary component is a collapsed object is also discussed; theCopernicus observations are consistent with the hypothesis that the spectroscopically invisible secondary component is a black hole.

Keywords

Black Hole Mass Transfer Spectrophotometry Current Result Emission Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1975

Authors and Affiliations

  • Yoji Kondo
    • 1
  • Margherita Hack
    • 2
  • John B. Hutchings
    • 3
  • George E. McCluskeyJr.
    • 4
  • Miroslav Plavec
    • 5
  • Ronald S. Polidan
    • 5
  1. 1.Johnson Space CenterHoustonUSA
  2. 2.Astronomical ObservatoryTriesteItaly
  3. 3.Dominion Astrophysical ObservatoryVictoriaCanada
  4. 4.Lehigh UniversityBethlehemUSA
  5. 5.University of CaliforniaLos AngelesUSA

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