{
  "abstract": "While the gravothermal collapse of self-interacting dark matter (SIDM) halos provides a compelling mechanism for seeding supermassive black holes (BHs), the post-collapse macroscopic co-evolution of the BH and its host halo remains largely unexplored. In this paper, we introduce a novel N-body framework to dynamically model the dark matter accretion onto the central BH. By bracketing the accretion rate with two complementary phenomenological schemes---a `multi-round core-collapse' scenario and a `continuous accretion' scenario---we establish bounds on the BH mass growth trajectory. We find that the BH mass reaches $5\\%-12\\%$ of the total halo mass within $\\lesssim2$ Gyr post-collapse. Concurrently, this sustained mass depletion drives a `gravothermal supply chain' that forces outer dark matter inward, severely depleting the inner halo density ($\\lesssim 2r_s$). This unique structural imprint qualitatively matches the recently detected anomaly in the strong lens JVAS B1938+666 (detection V), where the best-fit lens model consists of an unresolved central point mass and a shallow, uniform-surface-density extended disk, offering a distinct observational signature for SIDM-seeded BHs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.22758",
  "author_total": 6,
  "authors": [
    {
      "name": "Zhichao Carton Zeng"
    },
    {
      "name": "Annika H. G. Peter"
    },
    {
      "name": "Louis E. Strigari"
    },
    {
      "name": "Andrew Benson"
    },
    {
      "name": "Xiaolong Du"
    },
    {
      "name": "Charlie Mace"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2gq1awdgr07cr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22758",
  "fulltext_url": null,
  "id": "2gq1awdgr07cr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22758",
  "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.CO"
    ],
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7214016186",
  "pdf_url": "https://arxiv.org/pdf/2609.22758",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2gq1awdgr07cr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.22758",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22758"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Feeding the Void: Co-evolution of the SIDM-seeded Black Hole and the dark halo after core-collapse",
  "title_text": "Feeding the Void: Co-evolution of the SIDM-seeded Black Hole and the dark halo after core-collapse",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/2gq1awdgr07cr",
  "venue": "arXiv",
  "versions": []
}