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Author Kuntz, K. D. ♦ Long, Knox S. ♦ Kilgard, Roy E.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ CATALOGS ♦ GALAXIES ♦ LUMINOSITY ♦ MASS ♦ SUPERNOVA REMNANTS ♦ TRANSIENTS ♦ X RADIATION ♦ X-RAY SOURCES
Abstract We have obtained a deep X-ray image of the nearby galaxy M51 using Chandra . Here we present the catalog of X-ray sources detected in these observations and provide an overview of the properties of the point-source population. We find 298 sources within the D {sub 25} radii of NGC 5194/5, of which 20% are variable, a dozen are classical transients, and another half dozen are transient-like sources. The typical number of active ultraluminous X-ray sources in any given observation is ∼5, and only two of those sources persist in an ultraluminous state over the 12 yr of observations. Given reasonable assumptions about the supernova remnant population, the luminosity function is well described by a power law with an index between 1.55 and 1.7, only slightly shallower than that found for populations dominated by high-mass X-ray binaries (HMXBs), which suggests that the binary population in NGC 5194 is also dominated by HMXBs. The luminosity function of NGC 5195 is more consistent with a low-mass X-ray binary dominated population.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-08-10
Publisher Place United States
Journal Astrophysical Journal
Volume Number 827
Issue Number 1


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