{
  "id": "2503.01172",
  "version": "v2",
  "published": "2025-03-03T04:38:54.000Z",
  "updated": "2025-05-06T02:24:26.000Z",
  "title": "Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462",
  "authors": [
    "Shigeo S. Kimura",
    "Lena Murchikova",
    "Kailash C. Sahu"
  ],
  "comment": "10 pages, 2 figures, 1 table, accepted for publication in ApJ",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Stellar-mass isolated black holes (IsoBHs) wandering in interstellar medium (ISM) are expected to be abundant in our Galaxy. Recently, an IsoBH, OGLE-2011-BLG-0462, was unambiguously discovered using astrometric microlensing. We examine prospects for detecting electromagnetic signatures from an accretion flow surrounding the IsoBH. The accretion rate onto the IsoBH should be highly sub-Eddington, which leads to formation of a hot accretion flow. In this paper, we evaluate the detectability of electromagnetic signals from the hot accretion flows in two accretion states: magnetically arrested disk (MAD) and classical radiatively inefficient accretion flows (RIAFs). For the MAD scenario, we find that the optical, infrared, and X-ray signals can be detectable by the current best facilities, such as HST, JWST, and Chandra, if the IsoBH is in a warm neutral medium. In contrast, for the classical RIAF scenario, the optical and X-ray emissions are weaker than MAD scenario, leading to unobservable signals for a typical parameter set. Future follow-up observations of OGLE-2011-BLG-0462 will provide a good test for theories of accretion processes.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2025-05-06T02:24:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "electromagnetic signatures",
      "detection prospects",
      "hot accretion flow",
      "mad scenario",
      "warm neutral medium"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}