{
  "id": "2204.06161",
  "version": "v1",
  "published": "2022-04-13T03:55:49.000Z",
  "updated": "2022-04-13T03:55:49.000Z",
  "title": "Realistic Detection and Early Warning of Binary Neutron Stars with Decihertz Gravitational-wave Observatories",
  "authors": [
    "Chang Liu",
    "Yacheng Kang",
    "Lijing Shao"
  ],
  "comment": "12 pages, 12 figures",
  "categories": [
    "astro-ph.HE",
    "gr-qc"
  ],
  "abstract": "We investigated the detection and localization of binary neutron star (BNS) populations with decihertz gravitational-wave observatories in a realistic detecting strategy, including real-time observations and early warnings. Assuming 4 years' operation of B-DECIGO, we found that the detected BNSs can be divided into three categories: (a) sources that merge within 1 year, which could be localized with an uncertainty of $\\Delta\\Omega \\sim 10^{0}$ deg$^2$; (b) sources that merge in 1-4 years, which take up three quarters of the total events and yield the most precise angular resolution with $\\Delta \\Omega\\sim 10^{-2}$ deg$^2$ and time-of-merger accuracy with $\\Delta t_c\\sim 10^{-1}$ s; and (c) sources that do not merge during the 4-yr mission window, which enable possible early warnings, with $\\Delta \\Omega\\sim 10^{-1}$ deg$^2$ and $\\Delta t_c\\sim 10^{0}$ s. Furthermore, we compared the pros and cons of B-DECIGO with the Einstein Telescope, and explored the prospects of detections using 3 other decihertz observatories and 4 BNS population models. In realistic observing scenarios, we found that decihertz detectors could even provide early-warning alerts to a source decades before its merger while their localizations are still more accurate than ground-based facilities. Finally we found a decrease of events when considering the confusion noise, but this could be partially solved by a proper noise subtraction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-04-13T03:55:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "binary neutron star",
      "decihertz gravitational-wave observatories",
      "early warning",
      "realistic detection",
      "precise angular resolution"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}