{
  "id": "1409.8200",
  "version": "v1",
  "published": "2014-09-29T17:22:43.000Z",
  "updated": "2014-09-29T17:22:43.000Z",
  "title": "Morphology of the MRI in Axial Symmetry: existence of a magnetic threshold",
  "authors": [
    "Giovanni Montani",
    "Daniela Pugliese"
  ],
  "comment": "5 pages",
  "categories": [
    "astro-ph.HE",
    "physics.plasm-ph"
  ],
  "abstract": "We analyze the linear stability of an axially symmetric ideal plasma disk, embedded in a magnetic field and endowed with a differential rotation. This study is performed by adopting the magnetic flux surface function as the fundamental dynamical variable, in order to outline the role played by the co-rotation theorem, in the background configuration. The present formulation shows the existence of a magnetic threshold for the emergence of a Magneto-rotational instability. In the Keplerian case, triggering unstable modes requires the magnetic field forms an angle greater than 30 degree with the equatorial plane.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-09-29T17:22:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic threshold",
      "axial symmetry",
      "magnetic flux surface function",
      "axially symmetric ideal plasma disk",
      "morphology"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1319281,
      "adsabs": "2014arXiv1409.8200M"
    }
  }
}