{
  "abstract": "The rapid emergence of massive black holes in the early Universe, possibly related to Little Red Dots, challenges conventional growth from light seeds. Dark-matter accretion offers a distinct route, and self-interacting dark matter (SIDM) makes it possible by behaving as a collisional fluid. We show that gas inflow can drive strong local contraction of an SIDM halo, assembling a dense reservoir around a pre-existing black-hole seed. The seed then enters a rapid dark-growth phase and can gain several orders of magnitude in mass within less than $1$ Myr before transitioning to slower accretion. We self-consistently follow this process by solving the spherical Euler equations with SIDM self-gravity, collisional heat transport, and an absorbing black-hole sink, rather than imposing an accretion history. The growth depends most strongly on halo mass, with weaker sensitivity to inflowing gas fraction, nuclear size, and seed mass. Gas-inflow-driven SIDM accretion therefore provides an efficient pathway for producing massive black holes in the early Universe.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.20022",
  "author_total": 4,
  "authors": [
    {
      "name": "Yu Rong"
    },
    {
      "name": "Shuang-Nan Zhang"
    },
    {
      "name": "Jian-Min Wang"
    },
    {
      "name": "Junxian Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e9gxkx3kgzdzp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20022",
  "fulltext_url": null,
  "id": "e9gxkx3kgzdzp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20022",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7213580053",
  "pdf_url": "https://arxiv.org/pdf/2609.20022",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e9gxkx3kgzdzp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20022",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20022"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Rapid Dark Growth of Seed Black Holes in Self-Interacting Dark Matter",
  "title_text": "Rapid Dark Growth of Seed Black Holes in Self-Interacting Dark Matter",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/e9gxkx3kgzdzp",
  "venue": "arXiv",
  "versions": []
}