{
  "id": "1909.03236",
  "version": "v1",
  "published": "2019-09-07T10:07:39.000Z",
  "updated": "2019-09-07T10:07:39.000Z",
  "title": "Generation of strong magnetic fields in old neutron stars accounting for continuous chiral magnetic effect",
  "authors": [
    "Maxim Dvornikov",
    "V. B. Semikoz",
    "D. D. Sokoloff"
  ],
  "comment": "14 pages in LaTeX2e, JCAP LaTeX style, 6 eps figures",
  "categories": [
    "astro-ph.HE",
    "hep-ph"
  ],
  "abstract": "We suggest a new mean field dynamo model in anomalous MagnetoHydroDynamics (AMHD) accounting for the mean spin (polarization) of the magnetized chiral (ultrarelativistic) plasma of a neutron star (NS). For simplicity we consider a non-superfluid NS with its rigid rotation neglecting also any matter turbulence (convection) within a star. On this way, we recover the Chiral Magnetic Effect (CME) as a possible source for the amplification of a seed, sufficiently strong magnetic field, $B\\sim 10^{13}\\,\\text{G}$, up to values $B\\gtrsim 10^{18}\\,\\text{G}$ in old NS's, having ages $t\\gtrsim 10^6\\,\\text{yr}$. The important issue in AMHD model suggested is the continuous evolution of the chiral imbalance providing the CME for these ages, $\\partial_t\\mu_5 (t)\\neq 0$, in spite of the fast spin-flip in Coulomb collisions in the dense NS plasma that leads to vanishing $\\mu_5\\to 0$ at an earlier epoch in the corresponding protoneutron star. In contrast to the conventional mean-field dynamos, the dynamo drivers in the model are produced due to magnetic field generated at the previous stages of stellar evolution. It makes our model basically nonlinear.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-07T10:07:39.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "strong magnetic field",
      "continuous chiral magnetic effect",
      "old neutron stars accounting",
      "mean field dynamo model"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}