{
  "abstract": "TeV halos around Geminga and Monogem (B0656+14) reveal regions of strongly suppressed diffusion near middle-aged pulsars. Determining the sizes and magnetic-field strengths of these slow-diffusion zones is important for modelling lepton transport and assessing their contribution to the local positron excess. The Cherenkov Telescope Array Observatory (CTAO) will provide arcminute-scale imaging of extended gamma-ray emission. We construct two-zone diffusion models for Geminga and Monogem with GALPROP v57, injecting electrons and positrons according to the pulsar spin-down history and following their propagation through an evolving slow-diffusion bubble and the ambient interstellar medium. Calibrating to HAWC and Fermi-LAT measurements, we forward-fold the models through official CTAO instrument response functions, including realistic diffuse and instrumental backgrounds. For 50 h observations, both halos are detected with high significance ($\\sim 13$--$30,σ$) from either site. Under optimistic background assumptions, CTAO can distinguish changes of $Δγ_1 \\simeq 0.2$ in the high-energy injection index and $ΔB \\simeq 2,μ{\\rm G}$ in magnetic-field strength. For Monogem, compact bubbles with $R_{\\rm SDZ}\\approx30,{\\rm pc}$ can be distinguished from extended ($\\gtrsim50,{\\rm pc}$) cases, although very large bubbles remain degenerate because of the finite field of view. Using an alternative Galactic diffuse template in the fit changes detection significances and parameter sensitivities by $\\lesssim10%$, indicating robustness against plausible diffuse-background mismodelling.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.05245",
  "author_total": 4,
  "authors": [
    {
      "name": "Youyou Li"
    },
    {
      "name": "Oscar Macias"
    },
    {
      "name": "Manuela Vecchi"
    },
    {
      "name": "Shinichiro Ando"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aazwhnvzw0f1c.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.05245",
  "fulltext_url": null,
  "id": "aazwhnvzw0f1c",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.05245",
  "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",
      "3106|Astrophysics and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7167624002",
  "pdf_url": "https://arxiv.org/pdf/2607.05245",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/aazwhnvzw0f1c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:16Z",
      "native_id": "2607.05245",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.05245"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Geminga and Monogem in the CTAO Era: Probing TeV Halos and Cosmic-Ray Transport",
  "title_text": "Geminga and Monogem in the CTAO Era: Probing TeV Halos and Cosmic-Ray Transport",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:16Z",
  "url": "https://research.draconitic.com/paper/aazwhnvzw0f1c",
  "venue": "arXiv",
  "versions": []
}