X-ray observations of single-line spectroscopic binaries

Details X-ray observations of single-line spectroscopic binaries X-ray observations of single-line spectroscopic binaries

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...113..167s&link_type=abstract

Astronomy and Astrophysics, vol. 113, no. 1, Sept. 1982, p. 167-169.

Astronomy and Astrophysics

Astrophysics

3

B Stars, Binary Stars, Galactic Clusters, Line Spectra, Stellar Spectrophotometry, X Ray Sources, Emission Spectra, Radiation Distribution, Stellar Luminosity

Scientific paper

The Einstein Observatory was used to obtain X-ray images of fields centered on three very bright single-line spectroscopic binaries, Pi-5 Ori, Theta-2 Cru, and 112 Her. Three-sigma upper limits for the X-ray luminosity of these objects greater than about 200 times lower than earlier estimates are presented and the implications for the presence of a compact secondary in any of these objects are discussed. None of the three binaries is detected as an X-ray source, making the presence of a compact secondary highly unlikely. A cluster of galaxies, A 520, has been detected as an X-ray source lying nearly 28 arcmin from Pi-5 Ori.

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