{
  "abstract": "We investigate an entropic generalized Chaplygin-gas (gCg) cosmology in which a single dark fluid accounts for both dark matter and dark energy. We constrain the model using DESI baryon acoustic oscillations, redshift-space-distortion measurements, compressed Planck 2018 distance and lensing information, and Type Ia supernova likelihoods with PantheonPlus+SH0ES (PPS) and DES--Dovekie. For Planck+DESI+RSD+PPS, the entropic gCg model yields a Hubble constant of $H_{0}=68.64\\pm0.52\\,{\\rm km\\,s^{-1}\\,Mpc^{-1}}$ and the amplitude of matter fluctuations parameter of $S_{8}=0.797\\pm0.021$, compared with $H_{0}=67.31\\pm0.28\\,{\\rm km\\,s^{-1}\\,Mpc^{-1}}$ and $S_{8}=0.809\\pm0.021$ in $Λ$CDM. The simultaneous upward shift in $H_{0}$ and downward shift in $S_{8}$ occurs in the directions required for a partial alleviation of both tensions. We also show that when PPS is replaced by DES--Dovekie, the parameter shifts are smaller, the best-fit improvement is negligible, and the Bayesian evidence favours $Λ$CDM. Thus, the entropic gCg model provides a potentially interesting simultaneous shift of the Hubble constant and the matter-clustering amplitude, but its statistical support depends on the adopted supernova likelihood.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.22802",
  "author_total": 5,
  "authors": [
    {
      "name": "Kelvis A. Kulhkampa"
    },
    {
      "name": "Carlos H. Coimbra-Araújob"
    },
    {
      "name": "Abraão J. S. Capistrano"
    },
    {
      "name": "Luiz A. Cabral"
    },
    {
      "name": "José A. P. F. Marão"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cfppjemrw1h5b.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.22802",
  "fulltext_url": null,
  "id": "cfppjemrw1h5b",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.22802",
  "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",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7171502494",
  "pdf_url": "https://arxiv.org/pdf/2607.22802",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cfppjemrw1h5b.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2607.22802",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.22802"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Entropic Chaplygin-Gas cosmology and late-universe tension diagnostics",
  "title_text": "Entropic Chaplygin-Gas cosmology and late-universe tension diagnostics",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/cfppjemrw1h5b",
  "venue": "arXiv",
  "versions": []
}