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Binary-binary interactions and the formation of the PSR B1620-26 triple system in M4
Journal article   Open access

Binary-binary interactions and the formation of the PSR B1620-26 triple system in M4

Frederic A. Rasio, Steve Mcmillan and Piet Hut
The Astrophysical journal, v 438(1), pp L33-L36
01 Jan 1995
DOI: https://doi.org/10.1086/187708
url
https://doi.org/10.1016/j.jeurceramsoc.2015.07.029View
Accepted (AM)Open Access (Publisher-Specific),  Open
url
https://doi.org/10.1086/187708View
Published, Version of Record (VoR) Open

Abstract

ASTROPHYSICS
The hierarchical triple system containing the millisecond pulsar PSR B1620-26 in M4 is the first star system ever detected in a globular cluster. Such systems should form in globular clusters as a result of dynamical interactions between binaries. We propose that the triple system containing PSR B1620-26 formed through an exchange interaction between a wide primordial binary and a pre-existing binary millisecond pulsar. This scenario would have the advantage of reconciling the approximately 10(exp 9) yr timing age of the pulsar with the much shorter lifetime of the triple system in the core of M4.

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Domestic collaboration
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Astronomy & Astrophysics
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