A luminous X-ray binary in M82

Details A luminous X-ray binary in M82 A luminous X-ray binary in M82

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1724s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Nov. 1991, p. 1724-1728, 1915.

Astronomy and Astrophysics

Astronomy

10

Black Holes (Astronomy), Irregular Galaxies, X Ray Binaries, Luminosity, Point Sources, Ubv Spectra

Scientific paper

Optical CCD imaging at the position of a bright X-ray point source just off the visible disk of the nearby irregular galaxy M82 constrain it to be an X-ray binary with a 0.2-4 keV X-ray luminosity of not less than 9 x 10 exp 38 ergs/sec. Assuming that the X-ray emission is due to a single object, then by asumming an Eddington limit appropriate for pure electron scattering, this luminosity requires a minimum primary mass of not less than 15 solar masses; thus, this X-ray source is a black hole candidate. If the brightest optical object detected inside the X-ray error circle at B about 22.2 is the secondary to the X-ray emitter, it is most likely an early type star making this system the most luminous massive X-ray binary system known.

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