{
  "abstract": "Galaxy sizes are correlated with stellar mass and redshift, as characterised by size scaling relations. The inferred forms of these scaling relations are sensitive to how galaxies are classified -- either by their star formation activity (e.g. specific star-formation rate, sSFR) or by their morphology markers (e.g. bulge-to-total ratio, Sérsic index). We combine stellar mass and sSFR estimates from pop-cosmos (a generative model trained on COSMOS2020 Spitzer IRAC $\\textit{Ch.1} <26$) with size and morphology measurements from COSMOS-Web, obtaining $99,369$ galaxies. By investigating the size-mass and the size-redshift relations, we show that: (i) the sSFR/morphology splits give quantitatively different slopes, intercepts, and intrinsic scatter behaviour; (ii) intrinsic scatter depends on structural morphology but not on sSFR, which constrains the galaxy-halo connection; (iii) the quiescent and bulge-dominated size-mass relations both show double-power law breaks, but at different pivot masses, indicating that quenching and structural transformation occur on different time-scales; (iv) the morphology-dependent trends are only recoverable from space-based imaging. Further, the quiescent pivot mass $M_{\\ast} \\sim 10^{10.7}~\\mathrm{M}_{\\odot}$ coincides with the mass scale at which active galactic nuclei (AGN, infrared torus) bolometric luminosity fraction peaks in transitioning galaxies, while the bulge-dominated pivot mass $M_{\\ast} \\sim 10^{11.1}~\\mathrm{M}_{\\odot}$ coincides with the halo mass at which AGN-driven baryonic redistribution peaks, which may trace the interval over which AGN feedback ramps from quenching onset to structural transformation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.28489",
  "author_total": 10,
  "authors": [
    {
      "name": "Madalina N. Tudorache"
    },
    {
      "name": "Hiranya V. Peiris"
    },
    {
      "name": "Stephen Thorp"
    },
    {
      "name": "Sinan Deger"
    },
    {
      "name": "Daniel J. Mortlock"
    },
    {
      "name": "Gurjeet Jagwani"
    },
    {
      "name": "Anik Halder"
    },
    {
      "name": "Boris Leistedt"
    },
    {
      "name": "Benedict Van den Bussche"
    },
    {
      "name": "Joel Leja"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fr3jckgdsf55f.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.28489",
  "fulltext_url": null,
  "id": "fr3jckgdsf55f",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.28489",
  "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",
      "astro-ph.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7166692057",
  "pdf_url": "https://arxiv.org/pdf/2606.28489",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fr3jckgdsf55f.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2606.28489",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.28489"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "pop-cosmos: Galaxy size evolution across structural and star-formation classifications in COSMOS-Web",
  "title_text": "pop-cosmos: Galaxy size evolution across structural and star-formation classifications in COSMOS-Web",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/fr3jckgdsf55f",
  "venue": "arXiv",
  "versions": []
}