{
  "id": "1812.10733",
  "version": "v1",
  "published": "2018-12-27T14:41:57.000Z",
  "updated": "2018-12-27T14:41:57.000Z",
  "title": "Indication of Another Intermediate-mass Black Hole in the Galactic Center",
  "authors": [
    "Shunya Takekawa",
    "Tomoharu Oka",
    "Yuhei Iwata",
    "Shiho Tsujimoto",
    "Mariko Nomura"
  ],
  "comment": "Accepted for publication on the Astrophysical Journal Letters",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We report the discovery of molecular gas streams orbiting around an invisible massive object in the central region of our Galaxy, based on the high-resolution molecular line observations with the Atacama Large Millimeter/submillimeter Array (ALMA). The morphology and kinematics of these streams can be reproduced well through two Keplerian orbits around a single point mass of $(3.2 \\pm 0.6)\\times 10^4 \\ M_\\odot$. We also found ionized gas toward the inner part of the orbiting gas, indicating dissociative shock and/or photoionization. Our results provide new circumstantial evidences for a wandering intermediate-mass black hole in the Galactic center, suggesting also that high-velocity compact clouds can be probes of quiescent black holes abound in our Galaxy.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-12-27T14:41:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic center",
      "atacama large millimeter/submillimeter array",
      "high-resolution molecular line observations",
      "indication",
      "quiescent black holes abound"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}