Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..apr.h7004h&link_type=abstract
American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #H7.004
Physics
Scientific paper
The ever-increasing depth of X-ray surveys raises the possibility of detecting extremely X-ray faint source populations, including the X-ray faint early-type galaxy population. Such a population of galaxies presents the opportunity to study the long-term evolution of low-mass X-ray binary (LMXB) populations. To this end, we have assembled a sample of ˜400 low-luminosity early-type galaxies over 0.05 < z < 1.2 in the three deep Chandra surveys (the CDF-S, E-CDF-S and CDF-N). Even with the 4 Ms Chandra Deep Field coverage currently available, the deepest survey of the extragalactic sky ever conducted at X-ray wavelengths, the vast majority of these galaxies (>90%) are undetected, so our work relies heavily on stacking analysis. We compare our observational constraints with new theoretical models and discuss possibilities for future deep X-ray observations.
Hornschemeier Ann
Lehmer Bret
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