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Mass and spin properties of black-hole mergers reveal formation in triples — arXiv:2609.30378

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.30378
License (as archived): CC0-1.0
Archived: 2026-10-08T04:13:36.142Z
SHA-256 of the archived text: 84ddd8ba0aad3fd95afb56f0f50c6159c0484fba39e063610a94e2ac1a99a73f
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How to cite

Mass and spin properties of black-hole mergers reveal formation in triples — arXiv:2609.30378 — arXiv (en), https://arxiv.org/abs/2609.30378 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_47fb2229afdc (Metraipolis archive dc_47fb2229afdc, sha256 84ddd8ba0aad3fd95afb56f0f50c6159c0484fba39e063610a94e2ac1a99a73f)

BibTeX

@misc{dc47fb2229afdc,
  title = {Mass and spin properties of black-hole mergers reveal formation in triples — arXiv:2609.30378},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.30378},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_47fb2229afdc; sha256 84ddd8ba0aad3fd95afb56f0f50c6159c0484fba39e063610a94e2ac1a99a73f},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.30378. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Deciphering the formation channels of the observed binary black hole mergers remains a central open problem in gravitational-wave astronomy. With hundreds of detections, the inferred distribution of masses and spins reveals a rich diversity which is difficult to reconcile with traditional formation scenarios from isolated binary stars or dense stellar environments. Here, we consider the large fraction of massive progenitor stars found in hierarchical triples and investigate black hole mergers driven by gravitational perturbations from tertiary companions. Simulations of their dynamics and stellar evolution reproduce key features of the merger population, including: i) a sharp primary mass peak at $m_1\sim10\,\rm M_\odot$ dominating the population; ii) substantial fractions of systems with large spin-orbit angles within and beyond the peak, matching the skewed distributions of the spin parameters $\chi_{\rm eff}$ and $\chi_p$; iii) a mass-ratio distribution favouring equal masses with matching slopes. We further predict a sharp decline of mergers near $m_1\sim30\,\rm M_\odot$, coincident with the location of inferred features that may signal another channel dominating the high-mass tail. Our models of hierarchical triples demonstrate, for the first time, a formation scenario which simultaneously reproduces the principal properties inferred for the low-mass bulk of binary black hole mergers.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-28 in gr-qc).
Categorie arXiv: High Energy Astrophysical Phenomena (astro-ph.HE) ; Solar and Stellar Astrophysics (astro-ph.SR); General Relativity and Quantum Cosmology (gr-qc).
Pagina del lavoro: https://arxiv.org/abs/2609.30378 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-08T03:43:14.451Z dalla pagina https://arxiv.org/catchup/gr-qc/2026-09-28?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).