{
  "abstract": "Molecular hydrogen (H$_2$) is the fundamental component of the molecular gas reservoir that fuels star formation and black hole growth. While prominent hot H$_2$ emission ($\\gtrsim 1000$ K) has been explored in nearby galaxies, its excitation mechanisms at higher redshifts remain poorly constrained. We present a systematic study of hot molecular gas traced via ro-vibrational H$_2$ emitters at z~0.2-1.5 using JWST slitless spectroscopy. Exploiting JWST's great sensitivity to near-infrared H$_2$ ro-vibrational transitions such as H$_2$ 1-0 S(1), we build a sample of 144 H$_2$-luminous galaxies and characterize their multi-wavelength properties. About 96.5% and 80% of these galaxies are detected in the radio and far-infrared (FIR) bands, respectively, and their hot H$_2$ emission strongly correlates with the radio and FIR radiation. Based on radio excess, X-ray emission, and optical diagnostics, 62 sources (43%) exhibit significant AGN activity. The H$_2$ line luminosities of the sample show a sublinear dependence on radio luminosity, while the relation between the H$_2$ luminosities and total infrared luminosities is approximately linear after excluding the radio-excess sources. These scaling relations suggest that star formation provides a baseline contribution to hot H$_2$ excitation, while radio-excess sources require an additional contribution from AGN-related processes such as jet- or wind-driven shocks. These results reveal a multi-channel excitation scenario and shed new light on the interplay between star formation, AGN activity, and the interstellar medium during galaxy evolution.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.19319",
  "author_total": 8,
  "authors": [
    {
      "name": "Jie Chen"
    },
    {
      "name": "Linhua Jiang"
    },
    {
      "name": "Shuqi Fu"
    },
    {
      "name": "Zijian Zhang"
    },
    {
      "name": "Danyang Jiang"
    },
    {
      "name": "Jing Wang"
    },
    {
      "name": "Ran Wang"
    },
    {
      "name": "Darshan Kakkad"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3e41s5797y548.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.19319",
  "fulltext_url": null,
  "id": "3e41s5797y548",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.19319",
  "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.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7221860024",
  "pdf_url": "https://arxiv.org/pdf/2610.19319",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3e41s5797y548.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.19319",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.19319"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Hot Molecular Hydrogen in Galaxies at Redshift ~ 0.2-1.5 Revealed by JWST",
  "title_text": "Hot Molecular Hydrogen in Galaxies at Redshift ~ 0.2-1.5 Revealed by JWST",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/3e41s5797y548",
  "venue": "arXiv",
  "versions": []
}