{
  "id": "2502.04626",
  "version": "v1",
  "published": "2025-02-07T03:01:45.000Z",
  "updated": "2025-02-07T03:01:45.000Z",
  "title": "The Gas-to-Dust Ratio Investigation in the Massive Star-Forming region M17",
  "authors": [
    "Qi Zhao",
    "Zhibo Jiang",
    "Chao-Jian Wu",
    "Jie Zheng",
    "Cheng Cheng",
    "YiNan Zhu",
    "Hong Wu"
  ],
  "comment": "10 pages, 14 figures, 2 tables, Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "M17 is a well-known massive star-forming region, and its Gas-to-Dust Ratio (GDR) may vary significantly compared to the other areas. The mass of gas can be traced by the ${\\rm CO}$ emission observed in the \\emph{Milky Way Imaging Scroll Painting (MWISP) project}. The dust mass can be traced by analyzing the interstellar extinction magnitude obtained from the \\emph{United Kingdom Infrared Telescope (UKIRT)}. We computed the ratio ${W({\\rm CO})/A_V}$: for ${A_V \\le }$ 10 mag, ${{ W(^{12}{\\rm CO})/ A_V}= (6.27 \\pm 0.19)}$ ${\\mathrm{{K \\cdot km/s} \\cdot mag^{-1}}}$ and ${{ W(^{13}{\\rm CO})/ A_V} = (0.75 \\pm 0.72)}$ ${ \\mathrm{{K \\cdot km/s} \\cdot mag^{-1}}}$; whereas for ${{A_V} \\ge 10}$ mag, ${{ W(^{12}{\\rm CO})/ A_V} = (15.8 \\pm 0.06) }$ ${\\mathrm{{K \\cdot km/s} \\cdot mag^{-1}}}$ and ${{ W(^{13}{\\rm CO})/ A_V} = (3.11 \\pm 0.25)}$ ${ \\mathrm{{K \\cdot km/s} \\cdot mag^{-1}}}$. Then, we converted the ${W({\\rm CO})/A_V}$ into ${N(\\rm H)/A_V}$. Using the WD01 model, we derived the GDR: for ${A_V \\le }$ 10 mag, the GDRs were ${118 \\pm 9}$ for ${^{12}{\\rm CO}}$ and ${83 \\pm 62}$ for ${^{13}{\\rm CO}}$, comparable to those of the Milky Way; however, for ${A_V \\ge }$ 10 mag, the GDRs increased significantly to ${296 \\pm 3}$ for ${^{12}{\\rm CO}}$ and ${387 \\pm 40}$ for ${^{13}{\\rm CO}}$, approximately three times higher than those of the Milky Way. In the discussion, we compared the results of this work with previous studies and provided a detailed discussion of the influence of massive stars and other factors on GDR.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2025-02-07T03:01:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "massive star-forming region m17",
      "gas-to-dust ratio investigation",
      "milky way",
      "interstellar extinction magnitude",
      "dust mass"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}