{
  "abstract": "The Covarying Coupling Constants (CCC) framework, developed to account for high-redshift JWST (James Webb Space Telescope) observations, contains a mechanism – a covarying-constant virtual mass field keyed to local density – that modifies galactic dynamics without particle dark matter. We test it against the full Spitzer Photometry and Accurate Rotation Curves sample of 175 disc galaxies, extending an earlier study of a few objects. Working in an inverse formulation, in which each model predicts the baryonic rotation curve from the observed one, we compare CCC against Modified Newtonian Dynamics (MOND) and one- and two-parameter Navarro–Frenk–White (NFW) haloes on identical footing, using the reduced $\\chi ^2_\\nu$. We show that the published sharp density turn-off is unphysical and replace it with a smooth transition – the density-space analogue of the MOND interpolating function, with no new parameter. One-parameter smooth-CCC then performs comparably to galaxy-by-galaxy fitted MOND (lower $\\chi ^2_\\nu$ in 56 per cent of galaxies, mean $\\chi ^2_\\nu$ of 2.58 versus 2.65; the difference is not significant), while two-parameter NFW shows a substantially broader fit-quality distribution and a larger tail of poor or boundary-limited fits (mean $\\chi ^2_\\nu \\approx 7$). The CCC turn-off density is not universal (scatter 0.82 dex) and correlates with galaxy size, as expected for a spherical reconstruction of flattened discs. Recast as an acceleration, however, $a_t = V_{\\mathrm{flat}}^2/R_t$ has scatter 0.33 dex (91-galaxy resolved subset), matching the MOND scale $a_0$ (0.34 dex), of comparable magnitude (${\\sim}2\\times 10^{-10}\\, \\mathrm{m\\, s^{-2}}$), with its size correlation removed. Though not designed for galactic dynamics, CCC describes rotation curves as well as galaxy-by-galaxy fitted MOND.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Physics, University of Ottawa , Ottawa, ON K1N 6N5 ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Rajendra P Gupta",
      "orcid": "0000-0001-5423-2673"
    },
    {
      "affs": [
        0
      ],
      "name": "Nikolaos Samaras",
      "orcid": "0000-0001-8375-6652"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aahe912nt7psc.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1777",
  "fulltext_url": null,
  "id": "aahe912nt7psc",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1777/8910539",
  "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"
    ]
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  "openalex": "W7202387562",
  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag1777/71872052/stag1777.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-12",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/aahe912nt7psc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:17Z",
      "native_id": "10.1093/mnras/stag1777",
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      "url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1777/8910539"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Galaxies: Formation, Evolution, Phenomena",
      "subfield": "galaxies"
    }
  ],
  "title": "Testing Covarying Coupling Constants (CCC) against the full SPARC rotation-curve sample: a like-for-like comparison with MOND and NFW",
  "title_text": "Testing Covarying Coupling Constants (CCC) against the full SPARC rotation-curve sample: a like-for-like comparison with MOND and NFW",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:17Z",
  "url": "https://research.draconitic.com/paper/aahe912nt7psc",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": [
    {
      "doi": "10.48550/arxiv.2608.11575",
      "pid": "73f33t3bg9bnf",
      "relation": "preprint",
      "title": "Testing Covarying Coupling Constants (CCC) against the full SPARC rotation-curve sample: a like-for-like comparison with MOND and NFW",
      "venue": "arXiv"
    }
  ]
}