{
  "id": "1909.07132",
  "version": "v1",
  "published": "2019-09-16T11:35:21.000Z",
  "updated": "2019-09-16T11:35:21.000Z",
  "title": "Evolving neutron star+helium star systems to intermediate-mass binary pulsars",
  "authors": [
    "Tang Wenshi",
    "Liu Dongdong",
    "Wang Bo"
  ],
  "comment": "accepted for publication in MNRAS",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE"
  ],
  "abstract": "Intermediate-mass binary pulsars (IMBPs) are composed of neutron stars (NSs) and CO/ONe white dwarfs (WDs). It is generally suggested that IMBPs evolve from intermediate-mass X-ray binaries (IMXBs). However, this scenario is difficult to explain the formation of IMBPs with orbital periods ($P_{\\rm orb}$) less than 3 d. It has recently been proposed that a system consisting of a neutron star (NS) and a helium (He) star can form IMBPs with $P_{\\rm orb}$ less than 3 d (known as the NS+He star scenario), but previous works can only cover a few observed sources with short orbital periods. We aim to investigate the NS+He star scenario by adopting different descriptions of the Eddington accretion rate ($\\dot M_{\\rm Edd}$) for NSs and different NS masses ($M_{\\rm NS}$) varying from $1.10\\,\\rm M_{\\odot}$ to $1.80\\,\\rm M_{\\odot}$. Our results can cover most of the observed IMBPs with short orbital periods and almost half of the observed IMBPs with long orbital periods. We found that $\\dot{M}_{\\rm Edd}$$\\propto$$M_{\\rm NS}$$^{\\rm -1/3}$ could match the observations better than a specific value for all NSs. We also found that the final spin periods of NSs slightly decrease with the initial $M_{\\rm NS}$. The observed parameters of PSR J0621+1002, which is one of the well-observed IMBPs whose pulsar mass has been precisely measured, can be reproduced by the present work.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-16T11:35:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "intermediate-mass binary pulsars",
      "star systems",
      "evolving neutron",
      "short orbital periods",
      "neutron star"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}