{
  "id": "2311.04739",
  "version": "v1",
  "published": "2023-11-08T15:07:00.000Z",
  "updated": "2023-11-08T15:07:00.000Z",
  "title": "The High Energy X-ray Probe (HEX-P): Magnetars and Other Isolated Neutron Stars",
  "authors": [
    "J. A. J. Alford",
    "G. A. Younes",
    "Z. Wadiasingh",
    "M. Abdelmaguid",
    "H. An",
    "M. Bachetti",
    "M. Baring",
    "A. Beloborodov",
    "A. Y. Chen",
    "T. Enoto",
    "J. A. García",
    "J. D. Gelfand",
    "E. V. Gotthelf",
    "A. Harding",
    "C. -P. Hu",
    "A. D. Jaodand",
    "V. Kaspi",
    "C. Kim",
    "C. Kouveliotou",
    "L. Kuiper",
    "K. Mori",
    "M. Nynka",
    "J. Park",
    "D. Stern",
    "J. Valverde",
    "D. Walton"
  ],
  "comment": "22 pages, 8 figures, submitted to Frontiers",
  "categories": [
    "astro-ph.HE",
    "astro-ph.IM"
  ],
  "abstract": "The hard X-ray emission from magnetars and other isolated neutron stars remains under-explored. An instrument with higher sensitivity to hard X-rays is critical to understanding the physics of neutron star magnetospheres and also the relationship between magnetars and Fast Radio Bursts (FRBs). High sensitivity to hard X-rays is required to determine the number of magnetars with hard X-ray tails, and to track transient non-thermal emission from these sources for years post-outburst. This sensitivity would also enable previously impossible studies of the faint non-thermal emission from middle-aged rotation-powered pulsars (RPPs), and detailed phase-resolved spectroscopic studies of younger, bright RPPs. The High Energy X-ray Probe (HEX-P) is a probe-class mission concept that will combine high spatial resolution X-ray imaging ($<5$ arcsec half-power diameter (HPD) at 0.2--25 keV) and broad spectral coverage (0.2--80 keV) with a sensitivity superior to current facilities (including XMM-Newton and NuSTAR). HEX-P has the required timing resolution to perform follow-up observations of sources identified by other facilities and positively identify candidate pulsating neutron stars. Here we discuss how HEX-P is ideally suited to address important questions about the physics of magnetars and other isolated neutron stars.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-11-08T15:07:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high energy x-ray probe",
      "isolated neutron stars",
      "hard x-ray",
      "candidate pulsating neutron stars",
      "neutron stars remains"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}