Low-Mass X-Ray Binaries in the Large Magellanic Cloud

Details Low-Mass X-Ray Binaries in the Large Magellanic Cloud Low-Mass X-Ray Binaries in the Large Magellanic Cloud

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.131..689p&link_type=abstract

Astrophysics and Space Science, Volume 131, Issue 1-2, pp. 689-689

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

We report results on three low-mass X-ray binaries (LMXB) in the LMC, obtained with EXOSAT, IUE and ground-based (ESO) telescopes: LMC X-2 which appears to be “Sco X-1”-like, LHG 83 and LHG 87. The latter are two weaker sources first detected in the course of the HEAO-B LMC survey. They have faint optical counterparts of which LHG 87 was only recently identified by us. In X-rays, they are characterized by ultrasoft X-ray spectra possibly characteristic of black-hole primaries. LHG 83 furthermore shows evidence for X-ray ionization of the surrounding interstellar medium, similar to the He III region around the black-hole candidate LMC X-1. X-ray binaries with masses of compact objects in excess of 3 M&sun; and ultrasoft X-ray spectra are comparatively frequent in the LMC. We suggest that subcritical accretion onto black holes takes place in LHG 83 and LHG 87.

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