{
  "abstract": "Context . Magnetic reconnection in the heliospheric current sheet (HCS) plays an important role in restructuring solar-wind magnetic topology and generating plasma jets and magnetic islands. While large-scale signatures of HCS reconnection have been reported in many observational studies, the kinetic-scale structure embedded within reconnection regions remains less well understood.\n\nAims . We aim to investigate the ion-scale current sheets (CSs) embedded within an HCS reconnection region and their relationship to the flow-shear layer at the edge of a reconnection jet.\n\nMethods . We analyzed an HCS crossing observed by the Parker Solar Probe on March 29, 2024, using high-time-resolution magnetic-field measurements. We focused on ion-scale magnetic transitions within two brief intervals of flow shear layers at the edges of the reconnection jet and examined them in a local LMN coordinate system.\n\nResults . Twelve representative CSs are identified, whose duration is on average ∼0.06 s, corresponding to spatial scales of only a few ion inertial lengths. Eight of the twelve CSs exhibit localized bipolar variations in the transverse B M component, with several also showing bifurcated B L profiles characterized by plateau-like structure. In the remaining events, strong transverse fluctuations prevented the identification of a clear bipolar B M signature.\n\nConclusions . The reconnection-jet shear layer in the HCS may serve as an active site that hosts a chain of ion-scale CSs. This provides new insight into the multiscale structure of HCS reconnection and suggests that flow shear layers may play an important role in generating secondary kinetic-scale structures.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Astronomy and Space Science, Chungbuk National University",
    "Space Sciences Laboratory, University of California",
    "Department of Earth Science Education, Chungbuk National University",
    "New Mexico Consortium"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Dae-Young Lee",
      "orcid": "0000-0001-9994-7277"
    },
    {
      "affs": [
        0
      ],
      "name": "Dooyoung Choi",
      "orcid": "0000-0002-3393-9060"
    },
    {
      "affs": [
        1
      ],
      "name": "Kyung-Eun Choi",
      "orcid": "0000-0003-2054-6011"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Sung Jun Noh",
      "orcid": "0000-0002-8032-7833"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4y0fe9ybw47dj.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202661982",
  "fulltext_url": null,
  "id": "4y0fe9ybw47dj",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://www.aanda.org/10.1051/0004-6361/202661982",
  "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|Solar and Space Plasma Dynamics"
    ]
  ],
  "openalex": "W7168967739",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/4y0fe9ybw47dj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:18Z",
      "native_id": "10.1051/0004-6361/202661982",
      "source": "crossref",
      "url": "https://www.aanda.org/10.1051/0004-6361/202661982"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Solar and Space Plasma Dynamics",
      "subfield": "stellar"
    }
  ],
  "title": "Ion-scale current sheets embedded in the reconnection-jet shear layer of the near-Sun heliospheric current sheet",
  "title_text": "Ion-scale current sheets embedded in the reconnection-jet shear layer of the near-Sun heliospheric current sheet",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:18Z",
  "url": "https://research.draconitic.com/paper/4y0fe9ybw47dj",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}