{
  "id": "2107.07979",
  "version": "v1",
  "published": "2021-07-16T15:50:13.000Z",
  "updated": "2021-07-16T15:50:13.000Z",
  "title": "On the moment of inertia of PSR J0737-3039 A from LIGO/Virgo and NICER",
  "authors": [
    "Zhiqiang Miao",
    "Ang Li"
  ],
  "comment": "9 pages, 5 figures, 2 tables",
  "categories": [
    "astro-ph.HE",
    "astro-ph.SR",
    "nucl-th"
  ],
  "abstract": "We extend our previous study (Li et al. 2021) on neutron stars with a quark core to predict the moment of inertia of pulsar A in the double pulsar binary J0737-3039, assuming there is a phase transition in the pulsar inner core from the soft QMF or the stiff DD2 hadronic equation of state (EOS) to a high-density phase of quark matter modelled by the generic \"constant-sound-speed\" (CSS) parameterization. We perform a Bayesian analysis of the moment of inertia by incorporating observational data for the tidal deformability of the GW170817 and GW190425 binary neutron star mergers, as detected by LIGO/Virgo, and the mass and radius of PSR J0030+0451 and MSP J0740+6620, as detected by the Neutron Star Interior Composition Explorer. We find that the most probable values of the moment of inertia of PSR J0737-3039 A are $1.27_{-0.14}^{+0.18}\\times10^{45}\\,{\\rm g\\,cm^2}$ for QMF+CSS and similarly $1.29_{-0.15}^{+0.26}\\times10^{45}\\,{\\rm g\\,cm^2}$ for DD2+CSS at $90\\%$ credible interval. We also demonstrate how a moment of inertia measurement would improve our knowledge of the EOS and the mass-radius relation for hybrid stars and discuss whether a quark deconfinement phase transition is supported by the available data and forthcoming data that could be consistent with this hypothesis.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-07-16T15:50:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron star interior composition explorer",
      "ligo/virgo",
      "gw190425 binary neutron star mergers",
      "quark deconfinement phase transition",
      "stiff dd2 hadronic equation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}