{
  "abstract": "We report the possible detection of a dark galaxy candidate (AGC 322753), via the cross-matching of the Arecibo Legacy Fast ALFA (ALFALFA) and the FAST All Sky H i (FASHI) H i blind surveys. It is detected by both surveys at the same recessional velocity, with a comparable H i mass of $2 \\times 10^{9} \\ {\\rm M}_\\odot$, and with similar H i spectral features. The ALFALFA and FASHI spectra show a double-peaked profile, compatible with a disc-like ordered rotation, and an H i linewidth at 50 per cent of the peak (W$_{50}$) of $\\sim 85$ km s$^{-1}$. The common intersection of the two beams allows the source position to be constrained with much greater precision than in either survey individually. Being detected by both radio telescopes, a radio frequency interference origin is excluded. No evidence of an optical counterpart was found down to $\\sim$ 27.5 mag arcsec$^{-2}$ in the DESI Legacy Imaging Surveys, which leads to a stellar mass limit of $M_\\bigstar \\lesssim 5 \\times 10^7 \\ {\\rm M}_\\odot$. Given this stellar mass limit, AGC 322753 has $M_{\\rm H\\,{\\small I}}/M_\\bigstar \\gtrsim 40$. The H i mass is higher than expected for totally starless haloes; this could imply that AGC 322753 is not completely ‘dark’ but could host a luminous counterpart below the current optical detection limit.",
  "abstract_shown": true,
  "affiliations": [
    "Centre for Astrophysics and Supercomputing, Swinburne University of Technology , John Street, Hawthorn VIC 3122 ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Marco Monaci",
      "orcid": "0000-0003-1319-7714"
    },
    {
      "affs": [
        0
      ],
      "name": "Duncan A Forbes"
    },
    {
      "affs": [
        0
      ],
      "name": "Warrick J Couch"
    },
    {
      "affs": [
        0
      ],
      "name": "Jean P Brodie"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cpcrf7zf76jz2.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1874",
  "fulltext_url": null,
  "id": "cpcrf7zf76jz2",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1874/8859321",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7215028733",
  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag1874/71561884/stag1874.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/cpcrf7zf76jz2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:17Z",
      "native_id": "10.1093/mnras/stag1874",
      "source": "crossref",
      "url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1874/8859321"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Galaxies: Formation, Evolution, Phenomena",
      "subfield": "galaxies"
    }
  ],
  "title": "AGC 322753: A dark galaxy candidate detected by ALFALFA and FASHI",
  "title_text": "AGC 322753: A dark galaxy candidate detected by ALFALFA and FASHI",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:17Z",
  "url": "https://research.draconitic.com/paper/cpcrf7zf76jz2",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": []
}