{
  "abstract": "We report new ALMA Band 7 high-resolution (∼0.05″) continuum and ¹² CO ( J = 3–2) observations of the disk around the young low-mass star Sz 76. Visibility plane modeling have revealed a previously undetected, faint outer dust ring centered at ∼45 au surrounding the compact central disk. Including this low-surface-brightness feature increases the characteristic dust radius from R dust,68 ≈ 7 au to 41 au. Combined with an outer gas extent of R CO,68 ≈ 77 au, the resulting gas-to-dust size ratio decreases from an extreme value of ∼11 to ∼2, setting Sz 76 in line with typical protoplanetary disks and contradicting a scenario of unimpeded inward radial drift. These results demonstrate that spatial filtering or limited surface-brightness sensitivity can severely underestimate disk sizes, highlighting the necessity of multi-scale observations to properly identify dust traps and accurately constrain disk evolution.",
  "abstract_shown": true,
  "affiliations": [
    "European Southern Observatory",
    "Instituto de Astronomía, Universidad Nacional Autónoma de México",
    "Dipartimento di Fisica, Università degli Studi di Milano",
    "Konkoly Observatory, HUN-REN Research Centre for Astronomy and Earth Sciences, MTA Centre of Excellence",
    "INAF – Osservatorio Astronomico di Capodimonte",
    "Thüringer Landessternwarte",
    "Department of Astronomy, Boston University",
    "Institute for Astronomy, University of Hawai’i at Mãnoa",
    "Instituto de Física y Astronomía, Universidad de Valparaíso",
    "Chinese Academy of Sciences South America Center for Astronomy (CASSACA), National Astronomical Observatories, CAS"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 12,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "G. Ricciardi",
      "orcid": "0009-0004-5398-1479"
    },
    {
      "affs": [
        0
      ],
      "name": "A. Miotello",
      "orcid": "0000-0002-7997-2528"
    },
    {
      "affs": [
        1
      ],
      "name": "K. Mauco",
      "orcid": "0000-0001-8284-4343"
    },
    {
      "affs": [
        0
      ],
      "name": "C. F. Manara",
      "orcid": "0000-0003-3562-262X"
    },
    {
      "affs": [
        2
      ],
      "name": "S. Facchini",
      "orcid": "0000-0003-4689-2684"
    },
    {
      "affs": [
        3
      ],
      "name": "Á. Kóspál",
      "orcid": "0000-0001-7157-6275"
    },
    {
      "affs": [
        4
      ],
      "name": "J. Alcalá",
      "orcid": "0000-0001-8657-095X"
    },
    {
      "affs": [
        5
      ],
      "name": "J. Eislöffel",
      "orcid": "0000-0001-6496-0252"
    },
    {
      "affs": [
        6
      ],
      "name": "C. C. Espaillat",
      "orcid": "0000-0001-9227-5949"
    },
    {
      "affs": [
        0
      ],
      "name": "M. Vioque",
      "orcid": "0000-0002-4147-3846"
    },
    {
      "affs": [
        7
      ],
      "name": "J. P. Williams",
      "orcid": "0000-0001-5058-695X"
    },
    {
      "affs": [
        8,
        9
      ],
      "name": "Z. Guo",
      "orcid": "0000-0003-0292-4832"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3gw5tjz48gnjm.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202662655",
  "fulltext_url": null,
  "id": "3gw5tjz48gnjm",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://www.aanda.org/10.1051/0004-6361/202662655",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W7220361171",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/3gw5tjz48gnjm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:18Z",
      "native_id": "10.1051/0004-6361/202662655",
      "source": "crossref",
      "url": "https://www.aanda.org/10.1051/0004-6361/202662655"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Astrophysics and Star Formation Studies",
      "subfield": "stellar"
    }
  ],
  "title": "A faint dust ring beyond the compact disk of Sz 76",
  "title_text": "A faint dust ring beyond the compact disk of Sz 76",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:18Z",
  "url": "https://research.draconitic.com/paper/3gw5tjz48gnjm",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}