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Evolution of Compact Binary Populations in Globular Clusters: a Boltzmann Study

Published online by Cambridge University Press:  01 September 2007

Sambaran Banerjee  and
Pranab Ghosh
Sambaran Banerjee
Affiliation:
Tata Institute of Fundamental Research, Mumbai 400005, India email: sambaran@tifr.res.in, pranab@tifr.res.in
Pranab Ghosh
Affiliation:
Tata Institute of Fundamental Research, Mumbai 400005, India email: sambaran@tifr.res.in, pranab@tifr.res.in
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Abstract

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We explore a Boltzmann scheme for studying the evolution of compact binary populations in globular clusters. We include processes of compact binary formation by tidal capture and exchange encounters, binary destruction by exchange and dissociation mechanisms and binary hardening by encounters, gravitational radiation and magnetic braking, as also the orbital evolution during mass transfer, following Roche lobe contact. From the evolution of compact-binary population, we investigate the dependence of the model number of X-ray binaries NXB on two essential cluster properties, namely, the star-star and star-binary encounter-rate parameters Γ and γ (Verbunt parameters). We find that the values of NXB and their expected scaling with the Verbunt parameters are in good agreement with results from recent X-ray observations of Galactic globular clusters.

Keywords

stellar dynamicsscatteringbinaries: closeX-rays: binariesglobular clusters: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S246: Dynamical Evolution of Dense Stellar Systems , September 2007 , pp. 246 - 250
Copyright
Copyright © International Astronomical Union 2008

References

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