{
  "abstract": "The young intermediate-mass star AB Aurigae is surrounded by a transition disk whose cavity contains several proposed protoplanets, including the debated source \"AB Aur b\" at a projected separation of $\\approx 0.6$ arcsec ($\\approx 93$ au). To search for circumplanetary material associated with these candidates, we have obtained the most sensitive ($\\sim 20$ $μ$Jy/beam rms) and highest angular resolution ($\\sim 30$ mas) ALMA Band 7 (0.88 mm) observations of AB Aur to date. We recover the asymmetric dust ring in the continuum emission peaking at $\\sim 0.9$ arcsec ($\\sim 140$ au) and compact emission at the stellar position, but detect no point source at the location of AB Aur b or any of the other proposed protoplanet candidates down to a $3σ$ limit of $60$ $μ$Jy. For optically thin emission, this corresponds to a dust mass of $\\lesssim 0.0059 M_\\oplus$ (for a dust temperature of 40 K), comparable to the circumplanetary disk around PDS 70 c. The $^{12}$CO emission fills the continuum cavity, revealing inner spiral structure and a clear rotation pattern. The gas at the position of AB Aur b is smoothly connected to the ambient disk with no localized excess or obvious kinematic deviation. If any proposed candidates are accreting, their circumplanetary material must have a low dust mass, a small physical size, dust that is optically thick, or a dearth of large mm-emitting grains.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37792",
  "author_total": 4,
  "authors": [
    {
      "name": "Lillian Jiang"
    },
    {
      "name": "Brendan P. Bowler"
    },
    {
      "name": "Ya-lin Wu"
    },
    {
      "name": "Yifan Zhou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9051y6js45mgz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37792",
  "fulltext_url": null,
  "id": "9051y6js45mgz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37792",
  "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.EP"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.37792",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9051y6js45mgz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.37792",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37792"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    }
  ],
  "title": "Searching for Circumplanetary Dust in the Cavity of the AB Aurigae Disk with ALMA",
  "title_text": "Searching for Circumplanetary Dust in the Cavity of the AB Aurigae Disk with ALMA",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/9051y6js45mgz",
  "venue": "arXiv",
  "versions": []
}