{
  "id": "2411.08837",
  "version": "v1",
  "published": "2024-11-13T18:17:50.000Z",
  "updated": "2024-11-13T18:17:50.000Z",
  "title": "A massive white dwarf or low-mass neutron star discovered by LAMOST",
  "authors": [
    "Xinlin Zhao",
    "Song Wang",
    "Pengfei Wang",
    "Chuanjie Zheng",
    "Haibo Yuan",
    "Jifeng Liu"
  ],
  "comment": "17 pages, 8 figures, accepted for publication in APJ",
  "categories": [
    "astro-ph.SR",
    "astro-ph.HE"
  ],
  "abstract": "We report the discovery of a close binary J0606+2132 (Gaia DR3 3423365496448406272) with $P_{\\rm obs}=2.77$ days containing a possible massive white dwarf or a neutron star using the LAMOST spectroscopic data. By a joint fitting of the radial velocity from LAMOST and the light curve from TESS, we derived a circular Keplerian orbit with an inclination of $i=$81.31$^{\\circ}$$^{+6.26^{\\circ}}_{-7.85^{\\circ}}$, which is consistent with that derived from $v{\\rm sin}I$. Together with the mass of the visible star, we derived the mass of the invisible object to be 1.34$^{+0.35}_{-0.40} M_{\\odot}$. Spectral disentangling with the LAMOST medium-resolution spectra shows no absorption feature from an additional component, suggesting the presence of a compact object. No X-ray or radio pulsed signal is detected from ROSAT and FAST archive observations. J0606+2132 could evolve into either a Type Ia supernova or a neutron star through accretion-induced collapse if it is a white dwarf, or into an intermediate-mass X-ray binary if it is a neutron star.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-11-13T18:17:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "massive white dwarf",
      "low-mass neutron star",
      "intermediate-mass x-ray binary",
      "type ia supernova",
      "lamost spectroscopic data"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}