{
  "abstract": "Context: The study investigates the complexity of the formation and evolution of a dome-spire-shaped jet (or anemone jet) that originated in an active region and was presumably driven by null-point magnetic reconnection. Aims: We aim to provide a quantitative estimation of multi-temperature plasma dynamics and physical parameters of the jet and its blob-like features, together with its temporal evolution in three-dimensional perspective. Methods: For this, we analyze unique sit-and-stare spectral (Si IV, Mg II k, and C II) and slit-jaw imaging 1400 Å and 2796 Å observations obtained with the Interface Region Imaging Spectrograph (IRIS), with a slit uniquely positioned just above the assumed reconnection site. Co-observations taken with the Fast Imaging Solar Spectrograph of the Goode Solar Telescope in the chromospheric H$α$ and Ca II 8542.10 Å lines were also analyzed. These data are complemented by EUV imaging information from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Results: The IRIS observations reveal that the jet is formed by multiple periodic ($\\sim$30 s) plasma ejections with blob-like appearance, each associated with strongly blueshifted Si IV 1402.77 Å transition-region emission reaching about $-300$ km/s. More importantly, the ejections are grouped into well-defined packets, each lasting approximately 3--5 min. In contrast, only a single Doppler component is observed in the chromospheric Ca II line. Multi-Gaussian decomposition of the Si IV line profiles reveals a highly accelerated plasma, with line-of-sight speed toward the observer increasing linearly from $\\sim$30 to 112 km/s over 66 s, corresponding to an acceleration of 1.3 km/s$^2$. The kinetic energy release rate is estimated in the range of $\\sim$1.0$\\times10^{24}$--1.0$\\times10^{25}$ erg\\,s$^{-1}$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.41343",
  "author_total": 4,
  "authors": [
    {
      "name": "Heesu Yang"
    },
    {
      "name": "Maria S. Madjarska"
    },
    {
      "name": "Kyoung-Sun Lee"
    },
    {
      "name": "Klaus Galsgaard"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d4ct61w1td0a8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.41343",
  "fulltext_url": null,
  "id": "d4ct61w1td0a8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.41343",
  "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"
    ],
    [
      "arxiv",
      "physics.plasm-ph"
    ],
    [
      "arxiv",
      "physics.space-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.41343",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d4ct61w1td0a8.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2610.41343",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.41343"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.plasm-ph",
      "subfield": "plasma"
    }
  ],
  "title": "Spectroscopic observations of periodic bursty ejections during a dome-spire-shaped jet",
  "title_text": "Spectroscopic observations of periodic bursty ejections during a dome-spire-shaped jet",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:51Z",
  "url": "https://research.draconitic.com/paper/d4ct61w1td0a8",
  "venue": "arXiv",
  "versions": []
}