{
  "abstract": "Magnetic helicity is typically indistinguishable from noise in the solar wind inertial range. Using Parker Solar Probe measurements (0.1–0.8 au), we report a robust bihelical structure emerging at the magnetohydrodynamic (MHD)–kinetic interface. This structure, formed by a striking pair of positive and negative peaks, exhibits a systematic spectral migration toward lower frequencies with increasing heliocentric distance. Crucially, this evolution deviates from local kinetic scaling laws, such as the radial decline of the ion cyclotron frequency, reflecting a nonlocal evolution of magnetic topology. Our findings provide a new observational constraint on both nonlocal MHD transport processes and the nature of the helicity barrier in the kinetic regime.",
  "abstract_shown": true,
  "affiliations": [
    "Technische Universität Braunschweig",
    "Max Planck Institute for Solar System Research",
    "Istituto Nazionale di Geofisica e Vulcanologia",
    "University of California",
    "KTH Royal Institute of Technology and Stockholm University",
    "Stockholm University",
    "Ilia State University",
    "Carnegie Mellon University",
    "Adelaide University",
    "National Institute for Space Research (INPE)",
    "Institute for Space Sciences",
    "Kyushu University",
    "Osaka University",
    "University of Tokyo",
    "Tohoku University",
    "Université de Lyon"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Masatomi Iizawa",
      "orcid": "0000-0002-3735-0616"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yasuhito Narita",
      "orcid": "0000-0002-5332-8881"
    },
    {
      "affs": [
        2
      ],
      "name": "Tommaso Alberti",
      "orcid": "0000-0001-6096-0220"
    },
    {
      "affs": [
        3
      ],
      "name": "Stuart D. Bale",
      "orcid": "0000-0002-1989-3596"
    },
    {
      "affs": [
        4,
        5,
        6,
        7
      ],
      "name": "Axel Brandenburg",
      "orcid": "0000-0002-7304-021X"
    },
    {
      "affs": [
        8,
        9
      ],
      "name": "Abraham C.-L. Chian",
      "orcid": "0000-0002-8932-0793"
    },
    {
      "affs": [
        10
      ],
      "name": "Horia Comişel",
      "orcid": "0000-0002-5028-8482"
    },
    {
      "affs": [
        11,
        12
      ],
      "name": "Shuichi Matsukiyo",
      "orcid": "0000-0002-4784-0301"
    },
    {
      "affs": [
        4,
        13,
        14,
        15
      ],
      "name": "Nobumitsu Yokoi",
      "orcid": "0000-0002-5242-7634"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4aj1b2kqm716x.bib",
  "cited_by": 0,
  "doi": "10.3847/2041-8213/aea84b",
  "fulltext_url": null,
  "id": "4aj1b2kqm716x",
  "issns": [
    "2041-8205",
    "2041-8213"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/2041-8213/aea84b",
  "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": "W4415310451",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/2041-8213/aea84b/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/4aj1b2kqm716x.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:13Z",
      "native_id": "10.3847/2041-8213/aea84b",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/2041-8213/aea84b"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Solar and Space Plasma Dynamics",
      "subfield": "stellar"
    }
  ],
  "title": "Nonlocal Evolution of Magnetic Helicity across the Magnetohydrodynamic–Kinetic Interface",
  "title_text": "Nonlocal Evolution of Magnetic Helicity across the Magnetohydrodynamic–Kinetic Interface",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:13Z",
  "url": "https://research.draconitic.com/paper/4aj1b2kqm716x",
  "venue": "The Astrophysical Journal Letters",
  "versions": []
}