{
  "abstract": "Ultralight axions can be gravitationally captured by massive bodies such as the Sun, producing solar-bound gravitational atom states that amplify the local dark matter density through Bose-enhanced capture. For axion masses in the range $10^{-14}\\text{eV}\\lesssim m_a \\lesssim 10^{-13}\\text{eV}$, this mechanism becomes exponentially efficient. We show that, for a representative decay constant $f_a\\sim 3.5\\times10^7$ GeV, the local axion dark matter density at Earth can grow to more than ten times the standard Galactic value of $ρ_0 = 0.4 \\text{ GeV/cm}^{3}$. Incorporating this overdensity, we derive updated limits on the axion-photon coupling from existing satellite and terrestrial measurements and present improved projections for upcoming experiments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.39775",
  "author_total": 3,
  "authors": [
    {
      "name": "Pierce Giffin"
    },
    {
      "name": "Pankaj Munbodh"
    },
    {
      "name": "Elisa G. M. Ferreira"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3eghc4h4arkjt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.39775",
  "fulltext_url": null,
  "id": "3eghc4h4arkjt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.39775",
  "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.CO"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7215067507",
  "pdf_url": "https://arxiv.org/pdf/2609.39775",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3eghc4h4arkjt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:49Z",
      "native_id": "2609.39775",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.39775"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Enhancing Constraints on Ultralight Axion Dark Matter from Gravitational Capture",
  "title_text": "Enhancing Constraints on Ultralight Axion Dark Matter from Gravitational Capture",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:49Z",
  "url": "https://research.draconitic.com/paper/3eghc4h4arkjt",
  "venue": "arXiv",
  "versions": []
}