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Physical Interactions Between Stars

Published online by Cambridge University Press:  04 August 2017

Jeremiah P. Ostriker
Jeremiah P. Ostriker*
Affiliation:
Princeton University Observatory, Princeton, New Jersey 08544 USA

Abstract

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Physical arguments are presented to show that two-body, tidal-capture binaries should form in abundance (Nb ~ 103) during the evolution of globular clusters by the time that core collapse begins. Interactions amongst these binaries and with core single stars will cause ejections from the cluster which pump energy into the system producing a bounce and re-expansion. Detailed numerical Fokker-Planck evolutionary calculations presented here confirm this scenario and indicate that this process is likely to be the dominant energy input for most clusters. During the re-expansion phase rcore ∝ t1/3, rhalf ∝ t2/3 with the core containing several hundred very close binary star systems.

Type
May 31: External Fields and Finite-Star-Size Effects
Information
Symposium - International Astronomical Union , Volume 113: Dynamic of Stars Clusters , 1985 , pp. 347 - 360
Copyright
Copyright © Reidel 1985 

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