An EXOSAT observation of the peculiar X-ray binary 2S 0921 630 during optical eclipse

Details An EXOSAT observation of the peculiar X-ray binary 2S 0921 630 during optical eclipse An EXOSAT observation of the peculiar X-ray binary 2S 0921 630 during optical eclipse

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..225m&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

4

Eclipsing Binary Stars, Exosat Satellite, Peculiar Stars, Stellar Occultation, X Ray Binaries, Accretion Disks, Charge Coupled Devices, Emission Spectra, Spaceborne Astronomy, Spectrum Analysis, Stellar Orbits, Stellar Spectrophotometry

Scientific paper

An X-ray observation of 2S 0921-630 has been made coincident with the time of optial eclipse of this 9-day binary. No significant reduction in X-ray flux is measured. This can be explained if the binary orbit is viewed almost exactly edge-on, so that the central X-ray emitting star is obscured by the accretion disk from direct view. The X-rays that are seen are scattered into the line of sight by material above and below the disk and the apparent size of the X-ray emission region is thus large compared to the size of the occulting star.

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