paper

eLISA eccentricity measurements as tracers of binary black hole formation

arXiv:1605.01341 · doi:10.1103/PhysRevD.94.064020

Abstract

Up to hundreds of black hole binaries individually resolvable by eLISA will coalesce in the Advanced LIGO/Virgo band within ten years, allowing for multi-band gravitational wave observations. Binaries formed via dynamical interactions in dense star clusters are expected to have eccentricities - at the frequencies Hz where eLISA is most sensitive, while binaries formed in the field should have negligible eccentricity in both frequency bands. We estimate that eLISA should always be able to detect a nonzero whenever ; if , eLISA should detect nonzero eccentricity for a fraction () of binaries when the observation time is () years, respectively. Therefore eLISA observations of BH binaries have the potential to distinguish between field and cluster formation scenarios.

13 pages, 7 figures, 4 tables, Matches version accepted in Physical Review D

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