{
  "id": "2005.01064",
  "version": "v1",
  "published": "2020-05-03T12:08:26.000Z",
  "updated": "2020-05-03T12:08:26.000Z",
  "title": "Compact intermediate-mass black hole X-ray binaries: potential LISA sources?",
  "authors": [
    "Wen-Cong Chen"
  ],
  "comment": "6 pages, 5 figures, ApJ in press",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The scientific aim of the space gravitational wave (GW) detector Laser Interferometer Space Antenna (LISA) that was scheduled to launch in the early 2030s is to detect the low-frequency GW signals in the Galaxy. Its main candidate GW sources are compact binaries of white dwarfs and neutron stars. In this work, we examine whether compact intermediate-mass black hole (IMBH) X-ray binaries could be potential LISA sources. Our simulations indicate that IMBH binary with a 1000 $M_{\\odot}$ IMBH and a 3 $M_{\\odot}$ donor star in an orbit of initial orbital period near the so-called bifurcation period of 0.77 d could evolve into an ultra-compact X-ray binary, which will emit GW signals with maximum frequency of 2.5 mHz. According to the evolutionary tracks of characteristic strain, IMBH X-ray binaries with the initial donor-star masses of $1-3~M_{\\odot}$ and the initial orbital periods slightly less than the bifurcation periods will be detectable by the LISA in a distance of 15 kpc. Assuming each of 60 Galactic globular clusters hosts a 1000 $M_{\\odot}$ IMBH, the maximum number of compact IMBH X-ray binaries that LISA will detect in the Galaxy should be less than ten. Therefore, the detectability of compact IMBH X-ray binaries by the LISA is not optimistic.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-05-03T12:08:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray binary",
      "compact intermediate-mass black hole x-ray",
      "intermediate-mass black hole x-ray binaries",
      "potential lisa sources",
      "imbh x-ray binaries"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}