{
  "abstract": "ESO 243$-$49 HLX--1 is one of the first known compelling intermediate-mass black hole (IMBH) candidates, but the origin of its recurrent X-ray outbursts remains unsettled. In this work we fit the HLX--1 outbursts simultaneously with a relativistic thin-disk time-dependent model. The black-hole and disk-geometry parameters are tied across epochs, while the injected mass and timing parameters are fitted separately for each outburst. We also include a contemporaneous \\textit{HST} UV/optical/IR spectral energy distribution obtained near the peak of one outburst, which constrains the global temperature and radius scales of the disk. The soft-state data are consistent with a common global solution, with black hole mass $\\log_{10}(M_{\\bullet}/M_\\odot)=4.5\\pm0.2$ and disk formation radius $\\log_{10}(r_0/r_g)=3.8\\pm0.3$. The differences between outbursts are mainly described by modest changes in disk mass and viscous timescales. The inferred injected masses are typically $\\sim 10^{-3}\\,M_\\odot$ per outburst, requiring a total fuel supply of at least a few $\\times 10^{-3}\\,M_\\odot$ across the observed sequence. This mass scale, and the disk size, are consistent with repeated partial stripping of a low-mass donor. A simple Keplerian mapping of the flare gaps and fitted disk radius implies a highly eccentric orbit with a pericenter just outside the donor's tidal radius. These results support a repeating partial tidal disruption interpretation for the origin of HLX--1.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.38694",
  "author_total": 3,
  "authors": [
    {
      "name": "Fangyuan Yu"
    },
    {
      "name": "Andrew Mummery"
    },
    {
      "name": "Muryel Guolo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7qsh3sr6vxtkv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38694",
  "fulltext_url": null,
  "id": "7qsh3sr6vxtkv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38694",
  "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.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.38694",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7qsh3sr6vxtkv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:49Z",
      "native_id": "2609.38694",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38694"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "HLX-1 as a Repeating Partial Tidal Disruption Event around an Intermediate-Mass Black Hole",
  "title_text": "HLX-1 as a Repeating Partial Tidal Disruption Event around an Intermediate-Mass Black Hole",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:49Z",
  "url": "https://research.draconitic.com/paper/7qsh3sr6vxtkv",
  "venue": "arXiv",
  "versions": []
}