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Research Note: The Expected Spins of Gravitational Wave Sources With Isolated Field Binary Progenitors

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arxiv 1702.00885 v1 pith:FU4U5APZ submitted 2017-02-03 astro-ph.HE

Matias Zaldarriaga , Doron Kushnir , Juna A. Kollmeier This is my paper · ORCID
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We explore the consequences of dynamical evolution of field binaries composed of a primary black hole (BH) and a Wolf-Rayet (WR) star in the context of gravitational wave (GW) source progenitors. We argue, from general considerations, that the spin of the WR-descendent BH will be maximal in a significant number of cases due to dynamical effects. In other cases, the spin should reflect the natal spin of the primary BH which are currently theoretically unconstrained. We argue that the three currently published LIGO systems (GW150914, GW151226, LVT151012) suggest that this spin is small. The resultant effective spin distribution of gravitational wave sources should thus be bi-model if this classic GW progenitor channel is indeed dominant. While this is consistent with the LIGO detections thus far, it is in contrast to the three best-measured high-mass x-ray binary (HMXB) systems. A comparison of the spin distribution of HMXBs and GW sources should ultimately reveal whether or not these systems arise from similar astrophysical channels.

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Cited by 3 Pith papers

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  1. Secondary spins of extreme mass ratio inspirals: A probe to the formation channels

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    For eccentric and inclined extreme mass-ratio inspirals, the secondary black hole spin may be measurable to about 0.1 at SNR 20, and high spins would point to the Hills formation channel.

  2. Revisiting GW150914 with a non-planar, eccentric waveform model

    gr-qc 2025-05 conditional novelty 5.0 of 10

    Using a waveform model that includes both eccentricity and spin precession, the authors confirm GW150914 was a quasi-circular, slowly spinning black hole merger, with eccentricity below 0.08 at 15 Hz.

  3. Modern tidal interaction models for rapid binary population synthesis: II. Binary black hole formation, mergers, and spins

    astro-ph.HE 2026-06 unverdicted novelty 4.0 of 10

    Simulations with a new tidal model in COMPAS predict that merging binary black holes from isolated evolution are strongly biased to low effective spins, with one third below 0.05 and only 3% above 0.5, but the high-sp...

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