Orbital eccentricity of binary radio pulsars in globular clusters and interaction between stars

Details Orbital eccentricity of binary radio pulsars in globular clusters and interaction between stars Orbital eccentricity of binary radio pulsars in globular clusters and interaction between stars

2009-01-09

arxiv.org/abs/0901.1295v2

Astrophys.J.693:L91-L95,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for publication in ApJ Letters; version modified after referee's comments

Scientific paper

10.1088/0004-637X/693/2/L91

We analyze the observed distribution of the orbital eccentricity and period of binary radio pulsars in globular clusters using computational tools to simulate binary-single star interactions. Globular clusters have different groups of pulsars arising from separate interaction scenarios. Intermediate eccentricities of cluster pulsars can be mostly accounted by fly-bys although locally lower stellar densities at pulsar positions may alter the situation. Very high eccentricities are likely to be results of exchanges and/or mergers of single stars with the binary companion of the pulsar.

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