{
  "abstract": "The chemistry of sulfur-bearing complex organic molecules in dense star-forming environments remains uncertain, partly because the dominant sulfur reservoirs in dense gas and ices are poorly identified. Alcohol--thioalcohol pairs allow direct comparisons of structurally related O- and S-bearing molecules. We present ALMA Band 6 observations of CH$_3$OH/CH$_3$SH and C$_2$H$_5$OH/C$_2$H$_5$SH toward three spectral-extraction positions (MM3-pos, MM4-pos, and MM5-pos) in the MM3--MM5 region of G35.2N. Local thermodynamic equilibrium modeling yields column densities and abundance ratios. CH$_3$OH column densities were inferred from $^{13}$CH$_3$OH assuming $^{12}$C/$^{13}$C = 50 to mitigate optical-depth effects. CH$_3$OH, CH$_3$SH, and C$_2$H$_5$OH are robustly constrained at all three positions; C$_2$H$_5$SH is robustly constrained at MM3-pos and MM5-pos but remains tentative at MM4-pos. The corresponding adopted column-density ranges are $(1.8-2.7)\\times10^{18}$, $(1.7-2.6)\\times10^{16}$, $(5.7-8.5)\\times10^{16}$, and $(2.4-4.6)\\times10^{15}$ cm$^{-2}$. The CH$_3$OH/C$_2$H$_5$OH and CH$_3$OH/CH$_3$SH ratios are consistent across the positions within uncertainties, with nominal values of 31--32 and 100--110, respectively. Comparisons with chemically rich sources and warm-up chemical models show that CH$_3$OH/C$_2$H$_5$OH lies within the range measured elsewhere, whereas CH$_3$OH/CH$_3$SH exhibits greater source-to-source variation. The ethyl-level O/S comparison remains less certain because many literature C$_2$H$_5$SH measurements provide only lower limits. CH$_3$OH/CH$_3$SH is thus the best-constrained O/S alcohol--thioalcohol ratio in these data and provides an empirical probe of source-dependent sulfur-bearing organic chemistry. More sensitive C$_2$H$_5$SH observations are needed to test C$_2$H$_5$OH/C$_2$H$_5$SH.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Astronomy & Astrophysics, 2026, Volume 713, Number 67",
  "arxiv": "2609.20671",
  "author_total": 9,
  "authors": [
    {
      "name": "Xuefang Xu"
    },
    {
      "name": "Shanghuo Li"
    },
    {
      "name": "Qian Gou"
    },
    {
      "name": "Chunguo Duan"
    },
    {
      "name": "Laurent Pagani"
    },
    {
      "name": "Di Li"
    },
    {
      "name": "Jun Kang"
    },
    {
      "name": "Jiaxin Du"
    },
    {
      "name": "Jiaxiang Jiao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/feqmrv8p6pqam.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20671",
  "fulltext_url": null,
  "id": "feqmrv8p6pqam",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20671",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.20671",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/feqmrv8p6pqam.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20671",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20671"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Local constraints on alcohol--thioalcohol analogs in G35.2N",
  "title_text": "Local constraints on alcohol--thioalcohol analogs in G35.2N",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/feqmrv8p6pqam",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1051/0004-6361/202661403",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}