Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1010..342h&link_type=abstract
A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP Conference Proceedings, Volume 10
Astronomy and Astrophysics
Astronomy
X-Ray Binaries, Globular Clusters In The Milky Way, Astrometry And Reference Systems
Scientific paper
We present the results on our study of Low Mass X-ray Binaries in extragalactic globular cluster systems. Combined optical and near-infrared photometry allows us to set constraints on the age and metallicity of the stellar population forming the globular cluster. Given that stars in globular clusters share the same age and chemical composition, we can use these results to investigate the dependence of LMXB formation efficiency on age and metallicity. In our sample of early-type galaxies, NGC 4472, NGC 4594, and NGC 3585, almost all globular clusters found to host LMXBs are metal-rich. Within the metal-rich population, LMXBs-hosting globular clusters are widely spread, which indicates that the LMXB formation efficiency requires not only a minimum metallicity, but is strongly dependent on it.
Hempel Maren
Kundu Arunav
Maccarone Tom
Zepf Steve E.
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