{
  "abstract": "Massive stars strongly influence their surroundings through radiative and mechanical feedback, but its effects on dense gas structures at sub-pc scales remain poorly constrained. We investigate how feedback from a newly formed massive star affects dense cores in the filamentary molecular cloud IRAS 18530+0215. We analyze ALMA Band 6 observations of 1.3 mm dust continuum and DCN, N$_2$D$^+$, and $^{13}$CS line emission, together with VLA K-band continuum and NH$_3$ observations. Dense cores are identified with astrodendro, and their temperatures, masses, velocity dispersions, and virial parameters are derived. The dynamical state of the ultra-compact H II region is examined through energy and pressure estimates. The H II region has a radius of $\\sim$0.1 pc and an expansion velocity of $\\sim$2.5 km s$^{-1}$, corresponding to a shell dynamical age of $\\sim$0.06 Myr. DCN and $^{13}$CS cores are concentrated near the H II region, whereas N$_2$D$^+$ cores preferentially lie farther away. Core temperatures and velocity dispersions decrease with projected distance from the H II region. Virial parameters increase within the inner $\\sim$0.3 pc but decline sharply beyond this scale, while core masses show no significant trend with distance. Strong star formation signatures are found at $\\sim$0.2 pc, whereas more distant regions still host quiescent, cold dense cores. The compact H II region appears trapped or choked within $\\sim$0.1 pc, while its feedback extends to at least $\\sim$0.3 pc. Within this region, feedback enhances core velocity dispersions, gas temperatures, and virial parameters, with no evidence that it promotes the formation of more massive dense cores.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.27913",
  "author_total": 26,
  "authors": [
    {
      "name": "Ruofei Zhang"
    },
    {
      "name": "Xing Lu"
    },
    {
      "name": "Jingwen Wu"
    },
    {
      "name": "Sihan Jiao"
    },
    {
      "name": "Hauyu Baobab Liu"
    },
    {
      "name": "Guang-Xing Li"
    },
    {
      "name": "Roberto Galván-Madrid"
    },
    {
      "name": "Aiyuan Yang"
    },
    {
      "name": "Siju Zhang"
    },
    {
      "name": "Shanghuo Li"
    },
    {
      "name": "Fengwei Xu"
    },
    {
      "name": "Xindi Tang"
    },
    {
      "name": "Yu Cheng"
    },
    {
      "name": "Weiyuan Zhang"
    },
    {
      "name": "Andrés E. Guzmán"
    },
    {
      "name": "Yuxin Lin"
    },
    {
      "name": "Yuhua Liu"
    },
    {
      "name": "Qizhou Zhang"
    },
    {
      "name": "Patricio Sanhueza"
    },
    {
      "name": "Ke Wang"
    },
    {
      "name": "Siyi Feng"
    },
    {
      "name": "Linjing Feng"
    },
    {
      "name": "Fangyuan Deng"
    },
    {
      "name": "Hao Ruan"
    },
    {
      "name": "Yuanzhen Xiong"
    },
    {
      "name": "Yuxiang Liu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/eha4avj01mhp7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.27913",
  "fulltext_url": null,
  "id": "eha4avj01mhp7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.27913",
  "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/2608.27913",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/eha4avj01mhp7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "2608.27913",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.27913"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "Dense Cores in the Vicinity of an HII Region",
  "title_text": "Dense Cores in the Vicinity of an HII Region",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/eha4avj01mhp7",
  "venue": "arXiv",
  "versions": []
}