Dynamical formation of close binary systems in globular clusters

Pooley, David, Lewin, Walter H. G., Anderson, Scott F., Baumgardt, Holger, Filippenko, Alexei V., Gaensler, Bryan M., Homer, Lee, Hut, Piet, Kaspi, Victoria M., Makino, Junichiro, Margon, Bruce, McMillan, Steve, Zwart, Simon Portefies, van der Klis, Michiel and Verbunt, Frank (2003) Dynamical formation of close binary systems in globular clusters. Astrophysical Journal, 591 2: L131-L134. doi:10.1086/377074

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Author Pooley, David
Lewin, Walter H. G.
Anderson, Scott F.
Baumgardt, Holger
Filippenko, Alexei V.
Gaensler, Bryan M.
Homer, Lee
Hut, Piet
Kaspi, Victoria M.
Makino, Junichiro
Margon, Bruce
McMillan, Steve
Zwart, Simon Portefies
van der Klis, Michiel
Verbunt, Frank
Title Dynamical formation of close binary systems in globular clusters
Journal name Astrophysical Journal   Check publisher's open access policy
ISSN 0004-637X
Publication date 2003-07
Sub-type Article (original research)
DOI 10.1086/377074
Open Access Status File (Publisher version)
Volume 591
Issue 2
Start page L131
End page L134
Total pages 4
Place of publication Philadelphia, PA, United States
Publisher Institute of Physics Publishing
Language eng
Formatted abstract
We know from observations that globular clusters are very efficient catalysts in forming unusual short-period binary systems or their offspring, such as low-mass X-ray binaries (LMXBs; neutron stars accreting matter from low-mass stellar companions), cataclysmic variables (white dwarfs accreting matter from stellar companions), and millisecond pulsars (rotating neutron stars with spin periods of a few milliseconds). Although there has been little direct evidence, the overabundance of these objects in globular clusters has been attributed by numerous authors to the high densities in the cores, which leads to an increase in the formation rate of exotic binary systems through close stellar encounters. Many such close binary systems emit X-radiation at low luminosities (LX <1034 ergs s-1) and are being found in large numbers through observations with the Chandra X-Ray Observatory. Here we present conclusive observational evidence of a link between the number of close binaries observed in X-rays in a globular cluster and the stellar encounter rate of the cluster. We also make an estimate of the total number of LMXBs in globular clusters in our Galaxy.
Keyword Binaries : close
Globular clusters : general
X-rays : binaries
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 131 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 173 times in Scopus Article | Citations
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