{
  "abstract": "We investigate the H$β$ broad-line region (BLR) size-luminosity ($R_{\\rm BLR}$-$L_{5100}$) relation of active galactic nuclei (AGN) using a Bayesian viewing angle inference framework based on the Failed Radiatively Accelerated Dusty Outflow (FRADO) model. First, we update the FRADO model by introducing a phase factor to account for the anisotropic visibility of the illuminated cloud surface. Second, we construct a Bayesian framework to constrain the viewing angle by matching the FRADO-based $R_{\\rm BLR}$ to the measured H$β$ lags of 151 AGN from Wang & Woo (2024). We successfully reproduce the slope and intrinsic scatter of the observed $R_{\\rm BLR}$-$L_{5100}$ relation, finding that the inferred viewing angles are broadly consistent with the estimates from dynamical modeling of velocity-resolved reverberation data, albeit with substantial scatter. As the observed H$β$ time lag and line velocity depend on the viewing angle, the black hole mass ($M_{\\rm BH}$) calibrated from our work is typically larger than the reverberation-mapping estimates using an average virial factor. Our results provide a physically motivated interpretation of the $R_{\\rm BLR}$-$L_{5100}$ relation and the systematic uncertainties in reverberation and single-epoch $M_{\\rm BH}$ estimates.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.41594",
  "author_total": 5,
  "authors": [
    {
      "name": "Junhee Myong"
    },
    {
      "name": "Jong-Hak Woo"
    },
    {
      "name": "Mohammad-Hassan Naddaf"
    },
    {
      "name": "Bożena Czerny"
    },
    {
      "name": "Jimin Kim"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0y1avep1dr1ty.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.41594",
  "fulltext_url": null,
  "id": "0y1avep1dr1ty",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.41594",
  "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.GA"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.41594",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0y1avep1dr1ty.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2610.41594",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.41594"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "The Broad-Line Region Size-Luminosity Relation in AGN Constrained by the Viewing Angle with the FRADO Model",
  "title_text": "The Broad-Line Region Size-Luminosity Relation in AGN Constrained by the Viewing Angle with the FRADO Model",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:18Z",
  "url": "https://research.draconitic.com/paper/0y1avep1dr1ty",
  "venue": "arXiv",
  "versions": []
}