Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.g1002c&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
High-resolution imaging with the Chandra X-ray Observatory provides unprecedented sensitivity to point sources and arcsecond-accuracy positions. These capabilities are opening a new window into globular clusters, revealing large populations of faint, X-ray emitting binary stars and compact objects, and enabling the identification of optical and radio counterparts even in crowded cluster cores. The origins of many of these sources are thought to be linked to stellar interactions, which significantly alter the stellar populations in the densest clusters. I will describe Chandra studies of three nearby globular clusters in which large numbers of X-ray sources have been found, together with Hubble Space Telescope observations used to locate optical counterparts. A primary goal of this work is to provide meaningful constraints on increasingly sophisticated dynamical models of globular clusters. Central to this task is to quantify and characterize the populations of binary stars, which dominate stellar interactions in the core and play a critical role in cluster dynamical evolution.
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