{
  "id": "1007.4788",
  "version": "v1",
  "published": "2010-07-27T18:41:08.000Z",
  "updated": "2010-07-27T18:41:08.000Z",
  "title": "ATCA observations of SiO masers in the Galactic center",
  "authors": [
    "Juan Li",
    "Tao An",
    "Zhi-Qiang Shen",
    "Atsushi Miyazaki"
  ],
  "comment": "15 pages, 3 figures, accepted by ApJ Letter",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the Australia Telescope Compact Array (ATCA) observations of the SiO masers in the Galactic center in transitions of v=1, J=2--1 at 86 GHz and v=1, J=1--0 at 43 GHz. Two 86-GHz SiO masers were detected within the central parsec, and they are associated with IRS 10EE and IRS 15NE, respectively. We detected eighteen 43-GHz SiO masers within a projected separation of <2 pc from Sagittarius A* (Sgr A*), among which seven masers are newly discovered from our observations. This raises the total number of 43-GHz SiO masers within the central 4 parsecs of the GC region to 22. Simultaneous observations at 86 and 43 GHz showed that the intensity of 43-GHz SiO maser is ~3 times higher than that of 86-GHz maser in IRS 10EE (an OH/IR star), while the integrated flux of the SiO maser emission at 43 GHz is comparable with that at 86~GHz in IRS~15NE (an ordinary Mira variable). These results are consistent with previous observations of massive late-type stars in the Galaxy in which the 86-GHz SiO maser is in general weaker than the 43-GHz SiO maser in OH/IR stars, while the two transitions are comparably strong in Mira stars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-07-27T18:41:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galactic center",
      "atca observations",
      "irs 10ee",
      "oh/ir star",
      "australia telescope compact array"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 863042,
      "adsabs": "2010arXiv1007.4788L"
    }
  }
}