{
  "abstract": "We investigate the spatially resolved extinction and ice column densities in four nearby interacting (U)LIRGs using JWST/NIRSpec integral field spectroscopy (R$\\sim$2700; 0.97--5.14 $μ$m). This wide range encompasses numerous (>25) H recombination and H$_2$ ro-vibrational emission lines, as well as the prominent H$_2$O ($\\sim$3.02 $μ$m) and CO$_2$ ($\\sim$4.26 $μ$m) ice absorption features. We develop three methods to derive phase-specific extinction for ionized (A$_{\\text K}^{\\text HII}$) and hot molecular gas (A$_{\\text K}^{\\text H_2}$), and H$_2$O and CO$_2$ ice column densities (N$_{\\text H_2O}$ and N$_{\\text CO_2}$), exploiting H and H$_2$ emission lines and ice absorption features. Nuclear regions (0.2\" radius) exhibit higher extinction and ice column densities than extended regions, with median A$_{\\text K}^{\\text HII}$ and A$_{\\text K}^{\\text H_2}$ of 1.25 and 0.75 in the nuclei, compared to 0.61 and 0.50 in the extended regions. The ionized gas is more extincted than the hot molecular gas, with A$_{\\text K}^{\\text HII}\\approx1.5$ A$_{\\text K}^{\\text H_2}$, while H$_2$O ice column densities are comparable between phases. In some nuclei, continuum-derived N$_{\\text H_2O}$ reaches $\\sim10^{18.81}$ cm$^{-2}$, likely due to compact obscured components. These results suggest that ionized gas originates in more deeply embedded regions, whereas water ice envelopes both gas phases, with additional ice-rich material around the most obscured nuclei. The median N$_{\\text CO_2}$/N$_{\\text H_2O}$ abundance ratio is $\\sim0.10$, a factor of 2--3 below typical Galactic values.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.24069",
  "author_total": 11,
  "authors": [
    {
      "name": "G. Speranza"
    },
    {
      "name": "M. Pereira-Santaella"
    },
    {
      "name": "I. García-Bernete"
    },
    {
      "name": "E. González-Alfonso"
    },
    {
      "name": "S. Arribas"
    },
    {
      "name": "I. Lamperti"
    },
    {
      "name": "M. Perna"
    },
    {
      "name": "A. Alonso-Herrero"
    },
    {
      "name": "L. Hermosa Muñoz"
    },
    {
      "name": "D. Rigopoulou"
    },
    {
      "name": "N. Thatte"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2jbb6g3pc47bm.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.24069",
  "fulltext_url": null,
  "id": "2jbb6g3pc47bm",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.24069",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.24069",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2jbb6g3pc47bm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.24069",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.24069"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Beyond the dust: JWST reveals extinction and ice content in local (U)LIRGs",
  "title_text": "Beyond the dust: JWST reveals extinction and ice content in local (U)LIRGs",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/2jbb6g3pc47bm",
  "venue": "arXiv",
  "versions": []
}