Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/8736
Title: Formation of chromospheric fan-shaped jets through magnetic reconnection
Authors: Bura, Annu
Samanta, T
Prasad, A
Moore, Ronald L
Sterling, Alphonse C
Yurchyshyn, Vasyl
Surya, Arun
Keywords: Solar filament eruptions
Solar magnetic reconnection
Solar magnetic fields
Solar spicules
Solar atmosphere
Active solar chromosphere
Solar chromosphere
Issue Date: 1-Jun-2025
Publisher: American Astronomical Society
Citation: The Astrophysical Journal Letters, Vol. 985, No. 2, L47
Abstract: Recurrent chromospheric fan-shaped jets highlight the highly dynamic nature of the solar atmosphere. They have been named as “light walls” or “peacock jets” in high-resolution observations. In this study, we examined the underlying mechanisms responsible for the generation of recurrent chromospheric fan-shaped jets utilizing data from the Goode Solar Telescope at Big Bear Solar Observatory, along with data from the Atmospheric Imaging Assembly (AIA) and the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory. These jets appear as dark elongated structures in Hα wing images, persist for over an hour, and are located in the intergranular lanes between a pair of same-polarity sunspots. Our analysis reveals that magnetic @ux cancellation at the jet base plays a crucial role in their formation. HMI line-of-sight magnetograms show a gradual decrease in opposite-polarity @uxes spanning the sequence of jets in Hα−0.8 Å images, suggesting that recurrent magnetic reconnection, likely driven by recurrent miniature @ux-rope eruptions that are built up and triggered by @ux cancellation, powers these jets. Additionally, magnetic Beld extrapolations reveal a 3D magnetic null-point topology at the jet formation site ∼1.25 Mm height. Furthermore, we observed strong brightening in the AIA 304 Å channel above the neutral line. Based on our observations and extrapolation results, we propose that these recurrent chromospheric fan-shaped jets align with the miniBlament eruption model previously proposed for coronal jets. Though our study focuses on fan-shaped jets in between same-polarity sunspots, a similar mechanism might be responsible for light-bridge-associated fan-shaped jets.
Description: Open Access
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
URI: http://hdl.handle.net/2248/8736
ISSN: 2041-8213
Appears in Collections:IIAP Publications

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