Mathematics – Probability
Scientific paper
Sep 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006head....9.0163z&link_type=abstract
American Astronomical Society, HEAD meeting #9, #1.63; Bulletin of the American Astronomical Society, Vol. 38, p.339
Mathematics
Probability
1
Scientific paper
The much greater probability of finding a low-mass X-ray binary in a metal-rich globular cluster compared to a metal-poor globular cluster has been clearly established observationally. However, the physical origin of this surprising effect remains uncertain, and there are several viable models that appeal to quite different physical mechanisms and have correspondingly different implications for the formation and evolution of LMXBs in general. One of the best ways to distinguish between these models for the metallicity effect is to compare X-ray spectra of metal-rich and metal-poor LMXBs, as different models make different predictions for the X-ray spectral index as a function of LMXB metallicity. We describe the important role spectroscopically selected extragalactic globular cluster samples have in carrying out such a study, and discuss new results from XMM and Chandra data on this question.
Kundu Anjan
Maccarone Thomas J.
Zepf Stephen E.
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