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arxiv 2010.13669 v2 pith:A24TOKVA submitted 2020-10-26 astro-ph.HE astro-ph.SR

Massive Stellar Triples Leading to Sequential Binary Black-Hole Mergers in the Field

Alejandro Vigna-G\'omez , Silvia Toonen , Enrico Ramirez-Ruiz , Nathan W.C. Leigh , Jeff Riley , Carl-Johan Haster This is my paper
classification astro-ph.HE astro-ph.SR
keywords mergerssequentialstellarbinaryblack-holefieldgravitational-wavemassive
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Stellar triples with massive stellar components are common, and can lead to sequential binary black-hole mergers. Here, we outline the evolution towards these sequential mergers, and explore these events in the context of gravitational-wave astronomy and the pair-instability mass gap. We find that binary black-hole mergers in the pair-instability mass gap can be of triple origin and therefore are not exclusively formed in dense dynamical environments. We discuss the sequential merger scenario in the context of the most massive gravitational-wave sources detected to date: GW170729 and GW190521. We propose that the progenitor of GW170729 is a low-metallicity field triple. We support the premise that GW190521 could not have been formed in the field. We conclude that triple stellar evolution is fundamental in the understanding of gravitational-wave sources, and likely, other energetic transientsas well.

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Cited by 5 Pith papers

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    gr-qc 2026-04 unverdicted novelty 6.0

    Two new surrogate models, trained on NR simulations, predict remnant properties and eccentricity dynamics for nonspinning eccentric black hole binaries with q ≤ 4 and e < 0.23.

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    Bayesian inference on LVK O1-O3 events with eccentric aligned-spin waveforms yields log10 Bayes factors of 1.77-4.75 favoring eccentricity for GW200129, GW190701 and GW200208_22, and >99.5% probability that at least o...

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    An isolated hierarchical triple channel with chemically homogeneous evolution and triple common envelope can produce PISN mass-gap BBH mergers matching GW190706 at ~22% of the observed rate.