{
  "id": "2306.12128",
  "version": "v1",
  "published": "2023-06-21T09:16:47.000Z",
  "updated": "2023-06-21T09:16:47.000Z",
  "title": "Spatial distributions and kinematics of shocked and ionized gas in M17",
  "authors": [
    "Feng-Yao Zhu",
    "Junzhi Wang",
    "Yaoting Yan",
    "Qing-Feng Zhu",
    "Juan Li"
  ],
  "comment": "13 pages, 11 figures",
  "journal": "MNRAS 522, 503 (2023)",
  "doi": "10.1093/mnras/stad996",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "Massive stars are formed in molecular clouds, and produce H II regions when they evolve onto the main sequence. The expansion of H II region can both suppress and promote star formation in the vicinity. M17 H II region is a giant cometary H II region near many massive clumps containing starless and protostellar sources. It is an appropriate target to study the effect of feedback from previously formed massive stars on the nearby star-forming environments. Observations of SiO 2-1, HCO$^+$ 1-0, H$^{13}$CO$^+$ 1-0, HC$_3$N 10-9, and H41$\\alpha$ lines are performed toward M17 H II region with ambient candidates of massive clumps. In the observations, the widespread shocked gas surrounding M17 H II region is detected: it probably originates from the collision between the expanding ionized gas and the ambient neutral medium. Some massive clumps are found in the overlap region of the shock and dense-gas tracing lines while the central velocities of shocked and high-density gases are similar. This suggests that part of massive clumps are located in the shell of H II region, and may be formed from the accumulated neutral materials in the shell. In addition, by comparing the observations toward M17 H II region with the simulation of cometary H II region, we infer the presence of one or more massive stars travelling at supersonic velocity with respect to the natal molecular cloud in the H II region.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-06-21T09:16:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ionized gas",
      "spatial distributions",
      "massive clumps",
      "massive stars",
      "kinematics"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}