Mathematics – Logic
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.2704t&link_type=abstract
American Astronomical Society, HEAD meeting #12, #27.04
Mathematics
Logic
Scientific paper
We present a significant leap forward in the understanding of the nature of X-ray point sources in normal galaxies via the first large systematic study of the physical mechanisms underlying observed X-ray binary luminosity functions (XRB-XLFs) in nearby galaxies. Until now, there has been a lack of large, non-phenomenological XRB-XLF studies, which we are addressing by combining the unprecedented angular resolution of Chandra with 2 million CPU hours of simulations at two major supercomputing centers (NASA-NCCS and Northwestern-Quest). We construct X-ray catalogs and observational XLFs from XSINGS, the extension of the legacy Spitzer Infrared Nearby Galaxies Survey (SINGS) into the X-ray regime. We construct theoretical XLFs for SINGS galaxies by combining a grid of >3000 detailed, physically motivated binary-star population synthesis models with star formation histories from spectral energy distribution modeling. Our comparisons of observational and theoretical XRB-XLFs provides the first constraints for XRB formation and evolution in this diverse ensemble of nearby normal galaxies.
Belczynski Krzysztof
Fragos Tassos
Hornschemeier Ann
Jenkins Leigh
Kalogera Vassiliki
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