{
  "abstract": "The Sunrise III/SUSI instrument performed a sit-and-stare observation of the off-limb emission in the Ca II K line core, with a combination of excellent temporal and spectral resolution. The emission reaches up to 6 Mm above the solar limb, indicating the existence of off-limb structures akin to spicules. In this letter, we describe the spatio-spectral properties of the observed emission, focusing on the spectral line shape resolved in detail by Sunrise III/SUSI, and compare the observation with simple modeling that relies on a numerical simulation of the solar chromosphere. We find that the simulation contains enough cool and dense material at Mm heights to produce off-limb emission, but that the spectral width of these features is slightly lower than observed, necessitating more detailed modeling.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.38575",
  "author_total": 35,
  "authors": [
    {
      "name": "Ivan Milić"
    },
    {
      "name": "Christopher M. J. Osborne"
    },
    {
      "name": "Francisco A. Iglesias"
    },
    {
      "name": "Juan Sebastián Castellanos Durán"
    },
    {
      "name": "Damien F. Przybylski"
    },
    {
      "name": "Lakshmi Pradeep Chitta"
    },
    {
      "name": "Sanghita Chandra"
    },
    {
      "name": "Andreas Lagg"
    },
    {
      "name": "Sami K. Solanki"
    },
    {
      "name": "Tino L. Riethmüller"
    },
    {
      "name": "Achim Gandorfer"
    },
    {
      "name": "Alex Feller"
    },
    {
      "name": "Johannes Hoelken"
    },
    {
      "name": "H. N. Smitha"
    },
    {
      "name": "Jose Carlos del Toro Iniesta"
    },
    {
      "name": "Yukio Katsukawa"
    },
    {
      "name": "Pietro Bernasconi"
    },
    {
      "name": "Thomas Berkefeld"
    },
    {
      "name": "Alberto Álvarez-Herrero"
    },
    {
      "name": "Masahito Kubo"
    },
    {
      "name": "Valentín Martínez Pillet"
    },
    {
      "name": "David Orozco Suárez"
    },
    {
      "name": "Bianca Grauf"
    },
    {
      "name": "Michael Carpenter"
    },
    {
      "name": "Alexander Bell"
    },
    {
      "name": "Hanna Strecker"
    },
    {
      "name": "Azaymi L. Siu-Tapia"
    },
    {
      "name": "Pablo Santamarina Guerrero"
    },
    {
      "name": "Julian Blanco Rodríguez"
    },
    {
      "name": "Yusuke Kawabata"
    },
    {
      "name": "Takuma Matsumoto"
    },
    {
      "name": "Ryohtaroh T. Ishikawa"
    },
    {
      "name": "Edvarda Harnes"
    },
    {
      "name": "Takayoshi Oba"
    },
    {
      "name": "Dušan Vukadinović"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5e2w1v2w6fs6b.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38575",
  "fulltext_url": null,
  "id": "5e2w1v2w6fs6b",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38575",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Solar and Space Plasma Dynamics"
    ]
  ],
  "openalex": "W7215071723",
  "pdf_url": "https://arxiv.org/pdf/2609.38575",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5e2w1v2w6fs6b.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:49Z",
      "native_id": "2609.38575",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38575"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Sunrise III/SUSI reveals extended and spectrally structured Ca II K emission above the solar limb",
  "title_text": "Sunrise III/SUSI reveals extended and spectrally structured Ca II K emission above the solar limb",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:49Z",
  "url": "https://research.draconitic.com/paper/5e2w1v2w6fs6b",
  "venue": "arXiv",
  "versions": []
}