{
  "abstract": "Remnant black holes formed in compact binary coalescences provide a clean setting for probing additional fields coupled to gravity. By analyzing the ringdown signals of the loudest LIGO-Virgo-KAGRA binary-black hole mergers, we search for massless curvature-coupled (pseudo)scalar fields arising in extensions to general relativity. We find no evidence for such fields and place 90% credible upper limits on the coupling length scale, ℓ ≲ ( 25 – 45 ) km, corresponding to scales significantly below the horizons of the remnant black holes. These results include the first gravitational-wave constraint on an axidilaton-type coupling. By isolating the ringdown phase and performing extensive robustness checks, our analysis provides a complementary observational probe to existing full-waveform constraints. As the gravitational-wave catalog expands, black hole ringdown spectroscopy will enable increasingly sensitive probes of gravity and additional fields using astrophysical black holes.",
  "abstract_shown": true,
  "affiliations": [
    "DAMTP",
    "University of Illinois Urbana-Champaign"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Adrian Ka-Wai Chung",
      "orcid": "0000-0003-2020-3254"
    },
    {
      "affs": [
        1
      ],
      "name": "Nicolás Yunes",
      "orcid": "0000-0001-6147-1736"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3s56pwheas0xy.bib",
  "cited_by": 20,
  "doi": "10.1103/2ctd-mgb6",
  "fulltext_url": null,
  "id": "3s56pwheas0xy",
  "issns": [
    "2470-0010",
    "2470-0029",
    "2470-0037"
  ],
  "landing_url": "https://doi.org/10.1103/2ctd-mgb6",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W4415312654",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-12",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/3s56pwheas0xy.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:20:45Z",
      "native_id": "W4415312654",
      "source": "openalex",
      "url": "https://doi.org/10.1103/2ctd-mgb6"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Pulsars and Gravitational Waves Research",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Black hole ringdown spectroscopy of curvature-coupled scalar and pseudoscalar fields",
  "title_text": "Black hole ringdown spectroscopy of curvature-coupled scalar and pseudoscalar fields",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:39Z",
  "url": "https://research.draconitic.com/paper/3s56pwheas0xy",
  "venue": "Physical review. D/Physical review. D.",
  "versions": []
}