{
  "id": "1204.3808",
  "version": "v1",
  "published": "2012-04-17T14:56:52.000Z",
  "updated": "2012-04-17T14:56:52.000Z",
  "title": "Water maser kinematics in massive star-forming regions: Cepheus A and W75N",
  "authors": [
    "J. M. Torrelles",
    "N. A. Patel",
    "S. Curiel",
    "J. F. Gómez",
    "G. Anglada",
    "R. Estalella"
  ],
  "comment": "Submitted to Bolet\\'in de la Asociaci\\'on Argentina de Astronom\\'ia (BAAA), Vol. 54, AAA-SOCHIAS meeting (September 17-21, 2011)",
  "categories": [
    "astro-ph.GA",
    "astro-ph.SR"
  ],
  "abstract": "VLBI multi-epoch water maser observations are a powerful tool to study the dense, warm shocked gas very close to massive protostars. The very high-angular resolution of these observations allow us to measure the proper motions of the masers in a few weeks, and together with the radial velocity, to determine their full kinematics. In this paper we present a summary of the main observational results obtained toward the massive star-forming regions of Cepheus A and W75N, among them: (i) the identification of different centers of high-mass star formation activity at scales of 100 AU; (ii) the discovery of new phenomena associated with the early stages of high-mass protostellar evolution (e.g., isotropic gas ejections); and (iii) the identification of the simultaneous presence of a wide-angle outflow and a highly collimated jet in the massive object Cep A HW2, similar to what is observed in some low-mass protostars. Some of the implications of these results in the study of high-mass star formation are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-04-17T14:56:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "massive star-forming regions",
      "water maser kinematics",
      "vlbi multi-epoch water maser observations",
      "high-mass star formation activity"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1111115,
      "adsabs": "2012arXiv1204.3808T"
    }
  }
}