Observational evidence for the origin of X-ray sources in globular clusters
Oct, 200710 pages
Part of Proceedings, IAU Symposium 246: Dynamical Evolution of Dense Stellar Systems : Capri, Italy, September 5-9, 2007, 301-310
Published in:
- IAU Symp. 246 (2008) 301-310
Contribution to:
- IAU Symposium 246, 301-310
- Published: May 9, 2008
e-Print:
- 0710.1804 [astro-ph]
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Abstract: (arXiv)
Low-mass X-ray binaries, recycled pulsars, cataclysmic variables and magnetically active binaries are observed as X-ray sources in globular clusters. We discuss the classification of these systems, and find that some presumed active binaries are brighter than expected. We discuss a new statistical method to determine from observations how the formation of X-ray sources depends on the number of stellar encounters and/or on the cluster mass. We show that cluster mass is not a proxy for the encounter number, and that optical identifications are essential in proving the presence of primordial binaries among the low-luminosity X-ray sources.References(25)
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