Mauerhan, Jon C. and Muno, Michael P. and Bauer, Franz E. and Morris, Mark R. (2008) Massive Stellar X‐ray Sources in the Galactic Center. In: A population explosion : the nature & evolution of x-ray binaries in diverse environments : St. Pete Beach, Florida, 28 October-2 November 2007. AIP Conference Proceedings. No.1010. American Institute of Physics , Melville, NY, pp. 122-126. ISBN 9780735405301. https://resolver.caltech.edu/CaltechAUTHORS:20090526-083058706
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Abstract
We present results of a spectroscopic survey of bright near-infrared counterparts to X-ray point sources from a deep Chandra survey of the Galactic nuclear bulge. K-band spectroscopy has revealed 13 new Wolf-Rayet and O-supergiant counterparts to Chandra soucres. Although they are systematically softer in X-rays than the general Galactic center source population of accretion powered CVs, their X-ray colors indicate a hard component consistent with emission from thermal plasma with kT>2 keV. Such hard X-ray emission is not ubiquitous among single Wolf-Rayet and O stars but is common among Wolf-Rayet+OB binaries with colliding supersonic winds. Although we regard colliding-wind binary hypothesis as the most likely scenario, it remains possible that several of these objects are wind-accreting neutron stars or black holes in supergiant high-mass X-ray binaries, or extraordinary single stars emitting hard X-rays.
| Item Type: | Book Section | ||||||
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| Additional Information: | © 2008 American Institute of Physics. Issue Date: 23 May 2008. | ||||||
| Subject Keywords: | accretion; black holes; Galactic centre; neutron stars; stellar spectra; stellar winds; supergiant stars; Wolf-Rayet stars; X-ray binary stars ; PACS: 98.70.Qy, 98.35.Jk, 95.55.Qf, 97.80.Jp. | ||||||
| Series Name: | AIP Conference Proceedings | ||||||
| Issue or Number: | 1010 | ||||||
| DOI: | 10.1063/1.2945018 | ||||||
| Record Number: | CaltechAUTHORS:20090526-083058706 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20090526-083058706 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 14294 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Tony Diaz | ||||||
| Deposited On: | 28 Aug 2009 23:03 | ||||||
| Last Modified: | 15 Nov 2022 21:55 |
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