Volume Dependence of Helicity-based Eruption Diagnostics in Recurrent Coronal Jets
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 HJ decreases during the first jet and gradually recovers between the two jets. In contrast, the free magnetic energy Efree shows no clear accumulation after its first release. This difference indicates that HJ provides information on magnetic evolution beyond that provided by Efree. Furthermore, the commonly used helicity ratio HJ/HV reaches different peaks near the onset of the two jets and is sensitive to the integration volume. By comparison, the locally normalized quantity HJ/Φclosed2 reaches similar peaks near the onset of both jets and is relatively insensitive to the choice among the tested integration volumes, where Φclosed is the single-polarity magnetic flux of the closed-field domain. These results reveal the local nature of the eruptions and suggest that HJ normalized by the square of the closed magnetic flux may be a useful diagnostic of eruptive conditions.
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BibTeX
@misc{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},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.12043},
eprint = {2610.12043},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.12043},
note = {CC BY 4.0},
}
RIS
TY - UNPB
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 - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2610.12043
UR - https://arxiv.org/abs/2610.12043
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.
ER -