{
  "id": "2305.09184",
  "version": "v1",
  "published": "2023-05-16T05:48:16.000Z",
  "updated": "2023-05-16T05:48:16.000Z",
  "title": "Imprint of magnetic obliquity in apparent spin-down of radio pulsars",
  "authors": [
    "Anton Biryukov",
    "Gregory Beskin"
  ],
  "comment": "MNRAS accepted",
  "doi": "10.1093/mnras/stad1437",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Numerical simulations predict that the spin-down rate of a single rotation-powered neutron star depends on the angle $\\alpha$ between its spin and magnetic axes as $P\\dot P \\propto \\mu^2 (k_0 + k_1\\sin^2\\alpha)$, where $P$ is the star spin period, $\\mu$ is its magnetic moment, while $k_0 \\sim k_1 \\sim 1$. Here we describe a simple observational test for this prediction based on the comparison of spin-down rates of 50 nearly orthogonal (with $\\alpha$ close to 90 deg) and 27 nearly aligned (with $\\alpha$ close to 0 deg) pulsars. We found, that the apparent pulsar spin-down is consistent with the theory if assumed, that magnetic moments of orthogonal rotators are systematically larger than those of aligned ones for $\\sim 0.15..0.2$ dex. Also, as a by-product of the analysis, we provide yet another constraint on the average braking index of radio pulsars as $1 \\le n \\le 4$ with formal significance not worse than 99\\%.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-05-16T05:48:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio pulsars",
      "apparent spin-down",
      "magnetic obliquity",
      "spin-down rate",
      "magnetic moment"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}