{
  "id": "0801.0846",
  "version": "v4",
  "published": "2008-01-07T06:49:20.000Z",
  "updated": "2008-11-22T07:05:12.000Z",
  "title": "Superradiant instability for black holes immersed in a magnetic field",
  "authors": [
    "R. A. Konoplya"
  ],
  "comment": "10 pages, Latex, 5 figures, corrected version",
  "journal": "Phys.Lett.B666:283-287,2008; Phys.Lett.B670:459,2009",
  "doi": "10.1016/j.physletb.2008.07.079 10.1016/j.physletb.2008.11.059",
  "categories": [
    "hep-th",
    "astro-ph",
    "gr-qc"
  ],
  "abstract": "We consider the bound states of the massive scalar field around a rotating black hole immersed in the asymptotically uniform magnetic field. In the regime of slow black hole rotation, the Klein-Gordon equation allows separation of variables. We show that the growth rate of the instability can be amplified a few times by the magnetic field. The effect occurs because the magnetic field adds the \"effective mass\" term $B |m|$ to the scalar field potential for a Kerr black hole. In addition, and as a by-product, we discuss the behavior of the quasinormal modes for the magnetized rotating black holes.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2008-11-22T07:05:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black holes",
      "superradiant instability",
      "slow black hole rotation",
      "kerr black hole",
      "scalar field potential"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Physics Letters B",
      "year": 2008,
      "month": "Sep",
      "volume": 666,
      "number": 4,
      "pages": 283
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 776860,
      "adsabs": "2008PhLB..666..283K"
    }
  }
}