{
  "id": "1503.05206",
  "version": "v1",
  "published": "2015-03-17T20:04:52.000Z",
  "updated": "2015-03-17T20:04:52.000Z",
  "title": "Powerful Outflows and Feedback from Active Galactic Nuclei",
  "authors": [
    "Andrew King",
    "Ken Pounds"
  ],
  "comment": "To appear in Annual Reviews of Astronomy and Astrophysics, Vol 53. 44 pages, 10 figures",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "Active Galactic Nuclei (AGN) represent the growth phases of the supermassive black holes in the center of almost every galaxy. Powerful, highly ionized winds, with velocities $\\sim 0.1- 0.2c$ are a common feature in X--ray spectra of luminous AGN, offering a plausible physical origin for the well known connections between the hole and properties of its host. Observability constraints suggest that the winds must be episodic, and detectable only for a few percent of their lifetimes. The most powerful wind feedback, establishing the $M -\\sigma$ relation, is probably not directly observable at all. The $M - \\sigma$ relation signals a global change in the nature of AGN feedback. At black hole masses below $M-\\sigma$ feedback is confined to the immediate vicinity of the hole. At the $M-\\sigma$ mass it becomes much more energetic and widespread, and can drive away much of the bulge gas as a fast molecular outflow.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-03-17T20:04:52.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "active galactic nuclei",
      "powerful outflows",
      "fast molecular outflow",
      "black hole masses",
      "powerful wind feedback"
    ],
    "publication": {
      "doi": "10.1146/annurev-astro-082214-122316"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 44,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1353354
    }
  }
}