{
  "abstract": "Baryonic feedback processes redistribute gas within and beyond dark matter halos, however, the resulting gas distribution remains highly uncertain, limiting predictions of the matter distribution for precision cosmology. We introduce a physically motivated approach to modelling the gas distribution that decomposes it into an approximately hydrostatic inner component and a diffuse outer component. This approach takes advantage of the growing observational landscape: X-ray measurements primarily probe the dense inner halo, while the kinetic Sunyaev-Zel'dovich (kSZ) effect is sensitive to diffuse ionized gas extending to larger radii. We implement this two-component profile within the baryonification framework, though we note that it is applicable to any model of the large-scale gas distribution. We jointly fit X-ray gas-fraction measurements from the HSC-XXL and eROSITA samples with stacked kSZ effect measurements of BOSS CMASS galaxies from the Atacama Cosmology Telescope, demonstrating that the proposed profile retains sufficient flexibility. This proof-of-concept shows that a decomposition between hydrostatic and diffuse gas provides a simple, physically interpretable framework for connecting complementary observations of the gas distribution, and a foundation for future models of baryonic feedback.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21861",
  "author_total": 5,
  "authors": [
    {
      "name": "Kaitlyn Shavelle"
    },
    {
      "name": "Jared Siegel"
    },
    {
      "name": "Leah Bigwood"
    },
    {
      "name": "Alexandra Amon"
    },
    {
      "name": "Romain Teyssier"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3kmqy4hr2wd2z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21861",
  "fulltext_url": null,
  "id": "3kmqy4hr2wd2z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21861",
  "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"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7213932533",
  "pdf_url": "https://arxiv.org/pdf/2609.21861",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3kmqy4hr2wd2z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21861",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21861"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "A two-component profile of baryonic feedback: hydrostatic and diffuse gas",
  "title_text": "A two-component profile of baryonic feedback: hydrostatic and diffuse gas",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/3kmqy4hr2wd2z",
  "venue": "arXiv",
  "versions": []
}