{
  "abstract": "Magnetic reconnection between emerging magnetic flux and the ambient coronal field fundamentally drives solar jets. We use three-dimensional resistive-MHD simulations of eruptive flux emergence to investigate how the large-scale current sheet formed at the interface fragments during recurrent jet activity. The simulations show that jet formation and current-sheet disruption are coupled elements of a single multiscale process. The current structures developing along open field lines and within the jet are relatively weak, exhibiting a predominantly filamentary morphology. In contrast, the larger structures linked to the closed-field topology are noticeably stronger, and the eruptive development of the emerging flux further increases both their number and strength. The parallel-current distributions within the closed magnetic field lines region exhibit Gaussian central cores with pronounced non-Gaussian tails, implying a small subset of strong, intermittent structures. Magnetic spectra follow a power law with a Kolmogorov-like slope in the large-scale range, becoming much steeper in the small-scale range---consistent with reconnection-mediated magnetic structuring. Box-counting analysis shows that the strongest current structures have a fractal dimension $D_{\\mathrm{f}} \\simeq 2$, indicating a fragmented population of sheet-like coherent structures. Cluster analysis further reveals broad, power-law distributions of cluster volumes and their Ohmic dissipation energies, with individual events reaching $\\sim 10^{20}$--$10^{25}$ erg over their estimated lifetimes. These results demonstrate that eruptive flux emergence can self-consistently transform a global reconnecting current sheet into a localized, intermittent, sheet-dominated dissipative network, providing a natural environment for impulsive coronal heating and motivating future particle-acceleration studies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: ApJ, 1011, 36 (2026)",
  "arxiv": "2609.25480",
  "author_total": 5,
  "authors": [
    {
      "name": "Vaggelis Karantanis"
    },
    {
      "name": "Loukas Vlahos"
    },
    {
      "name": "Heinz Isliker"
    },
    {
      "name": "Angelos Giannis"
    },
    {
      "name": "Vasilis Archontis"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3j1mefnay05wx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25480",
  "fulltext_url": null,
  "id": "3j1mefnay05wx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25480",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.25480",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3j1mefnay05wx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2609.25480",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25480"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Current Sheet Fragmentation in the Course of Repeated Eruptive Magnetic Flux Emergence",
  "title_text": "Current Sheet Fragmentation in the Course of Repeated Eruptive Magnetic Flux Emergence",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/3j1mefnay05wx",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/1538-4357/aeab92",
      "pid": "0a07gw3g6vqeh",
      "relation": "published-as",
      "title": "Current Sheet Fragmentation in the Course of Repeated Eruptive Magnetic Flux Emergence",
      "venue": "The Astrophysical Journal"
    }
  ]
}