High temperature plasma in beta Lyrae, observed from Copernicus

Details High temperature plasma in beta Lyrae, observed from Copernicus High temperature plasma in beta Lyrae, observed from Copernicus

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..38..353k&link_type=abstract

(International Astronomical Union, Colloquium on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, Cambridge, M

Astronomy and Astrophysics

Astronomy

5

Binary Stars, High Temperature Plasmas, Stellar Spectrophotometry, Ultraviolet Spectroscopy, Black Holes (Astronomy), Far Ultraviolet Radiation, Light Curve, Mass Transfer, Oao 3

Scientific paper

High-resolution UV spectrophotometry of the complex close binary system beta Lyrae was performed with a telescope spectrometer on board Copernicus. Observations were made at phases 0.0, 0.25, 0.5, and 0.75 with resolutions of 0.2 A (far-UV) and 0.4 A (mid-UV). The far-UV spectrum is completely dominated by emission lines indicating the existence of a high-temperature plasma in this binary. The spectrum of this object is unlike that of any other object observed from Copernicus. It is believed that this high-temperature plasma results from dynamic mass transfer taking place in the binary. The current results are compared with OAO-2 observations and other observational results. The possibility that the secondary component is a collapsed object is also discussed; the Copernicus observations are consistent with the hypothesis that the spectroscopically invisible secondary component is a black hole.

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