Ultraviolet study of V1341 CYG equals CYG X-2 - Observation of an accretion disk

Details Ultraviolet study of V1341 CYG equals CYG X-2 - Observation of an accretion disk Ultraviolet study of V1341 CYG equals CYG X-2 - Observation of an accretion disk

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..287c&link_type=abstract

(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Stellar Mass Accretion, Ultraviolet Astronomy, Variable Stars, X Ray Sources, Emission Spectra, Iue, Periodic Variations, Radiant Flux Density, Red Shift, Spectral Energy Distribution, Stellar Envelopes, Stellar Spectrophotometry, Stellar Temperature, Ultraviolet Spectra

Scientific paper

Observations of Cyg X-2 with the International Ultraviolet Explorer in the range 1200-3000 A are discussed with particular reference to the continuum. The dereddened UV spectrum indicates the presence of a contribution from a hot region of small area which is naturally interpreted as an X-ray heated accretion disk. Assuming an average X-ray luminosity of Lx equals 6.4 x 10 to the 37th erg/s, the solid angle subtended by the disk is estimated at l sterad from the ratio of the disk luminosity L disk equals L2 to Lx.

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