Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20924308t&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #243.08; Bulletin of the American Astronomical Society,
Mathematics
Logic
Scientific paper
Using the data of XMM-Newton and Chandra observations, we explore the possibility of identification of bright neutron star and black hole binary systems in nearby galaxies, based on the comparisons of their spectral properties and variability with that of the canonical Galactic neutron star and black hole X-ray binary systems. We show that X-ray spectral hardness-luminosity diagrams (or spectral photon index vs. luminosity diagrams) can be very effective tool for distinguishing between luminous (>3e37 ergs/s) neutron star systems and stellar-mass black hole candidates in the intermediate/high/very-high state. Using the central region of M31 as a case study, we identify 8 and 29 out of total 87 sources with luminosities above 5e36 ergs/s as probable black hole and neutron star candidates, combining X-ray spectral and variability information. Finally, we extend our study to several nearby galaxies of different morphological type.
Support for this work was provided through NASA Grant NAG5-12390.
Cordova France A.
Priedhorsky William C.
Trudolyubov Sergey P.
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