{
  "id": "1105.1895",
  "version": "v2",
  "published": "2011-05-10T09:53:26.000Z",
  "updated": "2011-05-24T18:42:45.000Z",
  "title": "Hydromagnetic Instabilities in Neutron Stars",
  "authors": [
    "Paul D. Lasky",
    "Burkhard Zink",
    "Kostas D. Kokkotas",
    "Kostas Glampedakis"
  ],
  "comment": "Accepted for publication in ApJL. Movies of the simulations can be seen at http://www.tat.physik.uni-tuebingen.de/~tat/grmhd/",
  "journal": "2011 ApJ 735, L20",
  "doi": "10.1088/2041-8205/735/1/L20",
  "categories": [
    "astro-ph.SR",
    "gr-qc"
  ],
  "abstract": "We model the non-linear ideal magnetohydrodynamics of poloidal magnetic fields in neutron stars in general relativity assuming a polytropic equation of state. We identify familiar hydromagnetic modes, in particular the 'sausage/varicose' mode and 'kink' instability inherent to poloidal magnetic fields. The evolution is dominated by the kink instability, which causes a cataclysmic reconfiguration of the magnetic field. The system subsequently evolves to new, non-axisymmetric, quasi-equilibrium end-states. The existence of this branch of stable quasi-equilibria may have consequences for magnetar physics, including flare generation mechanisms and interpretations of quasi-periodic oscillations.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-05-24T18:42:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron stars",
      "hydromagnetic instabilities",
      "instability",
      "poloidal magnetic fields",
      "non-linear ideal magnetohydrodynamics"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2011,
      "month": "Jul",
      "volume": 735,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 899091,
      "adsabs": "2011ApJ...735L..20L"
    }
  }
}