{
  "abstract": "Quasi-periodic eruptions (QPEs) are recurrent soft X-ray flares from galactic nuclei. In this work, we analyze both the quiescent and eruption emission of eRO-QPE2, using 11 XMM-Newton observations spanning $4.33\\,{\\rm yr}$. The key findings include (1) the eruption peak count rate remains approximately constant, while the quiescent count rate shows an approximately linear decline superposed with a large-amplitude oscillation; (2) no secondary eruptions are detected between the normal eruptions and any such events would have to be fainter by more than two orders of magnitude; (3) the recurrence time decreases at an average rate of $\\dot{T}_{\\rm rec}\\approx-5\\times10^{-6}$. These findings are consistent with an extreme mass-ratio inspiral (EMRI) interacting with a precessing accretion disk and producing two normal eruptions per orbital period. Bayesian timing analyses further constrain the EMRI orbital eccentricity to $e<0.033$ (at $95\\%$ confidence level).",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.21844",
  "author_total": 3,
  "authors": [
    {
      "name": "Zirui Zhang"
    },
    {
      "name": "Cong Zhou"
    },
    {
      "name": "Zhen Pan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0q139bdzc6d3r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.21844",
  "fulltext_url": null,
  "id": "0q139bdzc6d3r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.21844",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7222576892",
  "pdf_url": "https://arxiv.org/pdf/2610.21844",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0q139bdzc6d3r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.21844",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.21844"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Secular Evolution of Quasiperiodic Eruptions: eRO-QPE2",
  "title_text": "Secular Evolution of Quasiperiodic Eruptions: eRO-QPE2",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/0q139bdzc6d3r",
  "venue": "arXiv",
  "versions": []
}