{
  "abstract": "We determine the convergence of quasi-normal modes sums for a point-particle plunging into a Schwarzschild black hole. While a dynamical amplitude model reproduces the waveform after the particle crosses the bounce radius, a constant amplitude sum converges only after the start time $t_S$, which corresponds to the advanced time at which the particle hits the central singularity. For a plunge from the ISCO, $t_S \\simeq 9.4 M$ after the peak of the $22$ mode. After $t_S$, dynamical and constant amplitudes models are equivalent; our analysis also implies that any \"direct wave\" must reduce to the late-time tail after $t_S$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.05472",
  "author_total": 1,
  "authors": [
    {
      "name": "Adrien Kuntz"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fk14hs4q2vvf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.05472",
  "fulltext_url": null,
  "id": "4fk14hs4q2vvf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.05472",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.05472",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fk14hs4q2vvf.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.05472",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.05472"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "The Start Time of Ringdown",
  "title_text": "The Start Time of Ringdown",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:10Z",
  "url": "https://research.draconitic.com/paper/4fk14hs4q2vvf",
  "venue": "arXiv",
  "versions": []
}