A Caltech Library Service

Massive stellar X-ray sources in the galactic center

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. AIP Conference Proceedings. No.1. American Institute of Physics , Melville, NY, pp. 122-126. ISBN 1010.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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
Related URLs:
URLURL TypeDescription
Bauer, Franz E.0000-0002-8686-8737
Morris, Mark R.0000-0002-6753-2066
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:1
Record Number:CaltechAUTHORS:20090526-083058706
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14294
Deposited By: Tony Diaz
Deposited On:28 Aug 2009 23:03
Last Modified:08 Nov 2021 23:10

Repository Staff Only: item control page