{
  "abstract": "Proxima Centauri is the nearest known exoplanet-hosting star and a benchmark for low-mass stellar models. Published diameters differ by several percent, affecting its inferred radius and temperature. Model-dependent near-infrared limb darkening introduces an additional 2-5% correction to the inferred radius. We re-reduced two previously published VLTI/PIONIER interferometric epochs from 2014 and combined them with three previously unpublished archival epochs from 2017 and 2019. We fit all five data sets jointly with uniform-disk and atmosphere-grid-based center-to-limb models. The joint fit gives a uniform-disk angular diameter, $θ_{\\rm UD}=1.117\\pm0.024$ mas. Using the PHOENIX model and adopted bolometric flux, we obtain a PHOENIX limb-darkened angular diameter, $θ_{\\rm LD,PHX}=1.154\\pm0.026$ mas, a stellar radius, $R_\\star=0.162\\pm0.004\\,R_\\odot$, and a Stefan--Boltzmann effective temperature, $T_{\\rm eff,SB}=2833\\pm49$ K. No significant close companion is detected across the five epochs over the searched separation and contrast range.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.33373",
  "author_total": 4,
  "authors": [
    {
      "name": "Narsireddy Anugu"
    },
    {
      "name": "Alexandre Gallenne"
    },
    {
      "name": "Pierre Kervella"
    },
    {
      "name": "Adam D. Rains"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b2pvg3c2725jv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.33373",
  "fulltext_url": null,
  "id": "b2pvg3c2725jv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.33373",
  "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.EP"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7223925059",
  "pdf_url": "https://arxiv.org/pdf/2610.33373",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b2pvg3c2725jv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.33373",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.33373"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Proxima Centauri's Angular Diameter Revisited",
  "title_text": "Proxima Centauri's Angular Diameter Revisited",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/b2pvg3c2725jv",
  "venue": "arXiv",
  "versions": []
}