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Peer-reviewedCC BY 4.0The Astrophysical Journal Letters

Volume Dependence of Helicity-based Eruption Diagnostics in Recurrent Coronal Jets

  • Chang Zhou1
  • Jinhan Guo1
  • Yang Guo1
  • Jiajia Liu2
  • Zekun Lu3
  • Yuhang Gao4
4 affiliations
  1. 1Nanjing University
  2. 2University of Science and Technology of China
  3. 3Nagoya University
  4. 4Peking University
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Abstract

Recurrent solar coronal jets originate from the same source region, providing a useful setting for studying the buildup, redistribution, and release of magnetic energy and helicity. However, how these quantities can characterize magnetic evolution and the onset conditions of the eruptions remains unclear. We perform a full three-dimensional (3D) thermodynamic magnetohydrodynamic simulation of recurrent jets driven by converging motions imposed at the bottom boundary. The simulation naturally produces two successive eruptions. The current-carrying helicity H J decreases during the first jet and gradually recovers between the two jets. In contrast, the free magnetic energy E free shows no clear accumulation after its first release. This difference indicates that H J provides information on magnetic evolution beyond that provided by E free . Furthermore, the commonly used helicity ratio H J / H V reaches different peaks near the onset of the two jets and is sensitive to the integration volume. By comparison, the locally normalized quantity H J / Φ closed 2 reaches similar peaks near the onset of both jets and is relatively insensitive to the choice among the tested integration volumes, where Φ closed is the single-polarity magnetic flux of the closed-field domain. These results reveal the local nature of the eruptions and suggest that H J normalized by the square of the closed magnetic flux may be a useful diagnostic of eruptive conditions.

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Cite

BibTeXRIS
BibTeX
@article{zhou2026volume,
  title = {{Volume Dependence of Helicity-based Eruption Diagnostics in Recurrent Coronal Jets}},
  author = {Chang Zhou and Jinhan Guo and Yang Guo and Jiajia Liu and Zekun Lu and Yuhang Gao},
  journal = {The Astrophysical Journal Letters},
  year = {2026},
  month = oct,
  doi = {10.3847/2041-8213/aeb1d1},
  url = {https://iopscience.iop.org/article/10.3847/2041-8213/aeb1d1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Volume Dependence of Helicity-based Eruption Diagnostics in Recurrent Coronal Jets
AU  - Chang Zhou
AU  - Jinhan Guo
AU  - Yang Guo
AU  - Jiajia Liu
AU  - Zekun Lu
AU  - Yuhang Gao
PY  - 2026
DA  - 2026/10/26
JO  - The Astrophysical Journal Letters
DO  - 10.3847/2041-8213/aeb1d1
UR  - https://iopscience.iop.org/article/10.3847/2041-8213/aeb1d1
AB  - Recurrent solar coronal jets originate from the same source region, providing a useful setting for studying the buildup, redistribution, and release of magnetic energy and helicity. However, how these quantities can characterize magnetic evolution and the onset conditions of the eruptions remains unclear. We perform a full three-dimensional (3D) thermodynamic magnetohydrodynamic simulation of recurrent jets driven by converging motions imposed at the bottom boundary. The simulation naturally produces two successive eruptions. The current-carrying helicity H J decreases during the first jet and gradually recovers between the two jets. In contrast, the free magnetic energy E free shows no clear accumulation after its first release. This difference indicates that H J provides information on magnetic evolution beyond that provided by E free . Furthermore, the commonly used helicity ratio H J / H V reaches different peaks near the onset of the two jets and is sensitive to the integration volume. By comparison, the locally normalized quantity H J / Φ closed 2 reaches similar peaks near the onset of both jets and is relatively insensitive to the choice among the tested integration volumes, where Φ closed is the single-polarity magnetic flux of the closed-field domain. These results reveal the local nature of the eruptions and suggest that H J normalized by the square of the closed magnetic flux may be a useful diagnostic of eruptive conditions.
SN  - 2041-8205
SN  - 2041-8213
ER  -