{
  "abstract": "Interstellar pickup ions originate from the neutral interstellar medium, are ionized in the heliosphere, and picked up by the solar wind. They initially form a torus-shaped velocity distribution function, which is generally believed to be transformed rapidly into an isotropic shell distribution by pitch-angle scattering. With the SupraThermal Electron Proton onboard Solar Orbiter we observe clear torus-shaped velocity distribution functions at an unprecedented one minute resolution. While these tori are variable on a time scale of one minute, they remain stable for over ten hours without signs of significant scattering. We conclude that they are populated by a huge fraction of the expected total number of pick-up ions injected in the past of the same solar wind stream.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.27096",
  "author_total": 6,
  "authors": [
    {
      "name": "Chaoran Gu"
    },
    {
      "name": "Lars Berger"
    },
    {
      "name": "Verena Heidrich-Meisner"
    },
    {
      "name": "Erik Jentsch"
    },
    {
      "name": "Robert F. Wimmer-Schweingruber"
    },
    {
      "name": "Lars Seimetz"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8fq86jy6r9j36.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.27096",
  "fulltext_url": null,
  "id": "8fq86jy6r9j36",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.27096",
  "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.SR"
    ],
    [
      "openalex",
      "3103|Solar and Space Plasma Dynamics"
    ]
  ],
  "openalex": "W7162544563",
  "pdf_url": "https://arxiv.org/pdf/2605.27096",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8fq86jy6r9j36.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2605.27096",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.27096"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Observations of stable pickup He$^+$ tori in a magnetic flux rope at 0.85 au",
  "title_text": "Observations of stable pickup He^+ tori in a magnetic flux rope at 0.85 au",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/8fq86jy6r9j36",
  "venue": "arXiv",
  "versions": []
}