{
  "abstract": "Isolated stellar-mass black holes (IBHs) are expected to be abundant in the Milky Way, yet their electromagnetic signatures remain largely undetected. We investigate the detectability of IBHs in molecular clouds using a 1D, multi-wavelength emission model that incorporates magnetic flux transport controlled by the magnetic Prandtl number $P_m$. We find that magnetically arrested disks (MADs) form for $P_m\\gtrsim 1$, where the magnetic flux threading the black hole is in a saturation value. On the other hand, MAD formation is restricted to a limited parameter range for $P_m<1$, In our model, outer parts of accretion disks, around 100 gravitational radii, efficiently emit infrared photons detectable by WISE. This feature is not captured by the conventional one-zone model. X-ray emission depends strongly on $P_m$; For $P_m=1$ where MAD is formed, X-ray emission is dominated by nonthermal radiation, whereas inverse Compton emission becomes dominant for $P_m=0.5$ where the magnetic field is weaker than the saturation value. X-ray detection is plausible if they are in dense molecular-cloud filaments for $P_m\\ge1$, although it is challenging for $P_m< 1$. These results demonstrate that magnetic flux transport plays a key role in shaping the multiwavelength observational signatures of IBHs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: ApJ, 1009, 67 (2026)",
  "arxiv": "2606.31477",
  "author_total": 2,
  "authors": [
    {
      "name": "Takumi Koshimizu"
    },
    {
      "name": "Shigeo S. Kimura"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1kbma8km4hrtv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.31477",
  "fulltext_url": null,
  "id": "1kbma8km4hrtv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.31477",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.31477",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1kbma8km4hrtv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2606.31477",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.31477"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Multi-wavelength Emission Modeling from Accretion Flows around Isolated Black Holes Including Magnetic Flux Transport",
  "title_text": "Multi-wavelength Emission Modeling from Accretion Flows around Isolated Black Holes Including Magnetic Flux Transport",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/1kbma8km4hrtv",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/1538-4357/ae99d1",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}