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  Coronal jets of all sizes observed at sites of magnetic flux cancelation

Panesar, N., Sterling, A., Moore, R., Tiwari, S., Hansteen, V. (2023): Coronal jets of all sizes observed at sites of magnetic flux cancelation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3576

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020497 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020497_1
Genre: Conference Paper

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Panesar, Navdeep1, Author
Sterling, Alphonse1, Author
Moore, Ronald1, Author
Tiwari, Sanjiv1, Author
Hansteen, Viggo1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Solar coronal jets of all sizes are magnetically channeled eruptions that occur in all types of solar environments (e.g. active regions, quiet-Sun regions and coronal holes). They are often observed in the solar corona in EUV and coronal X-ray images. Recent studies show that coronal jets are driven by the eruption of small-scale filaments (minifilaments). Once the eruption is underway external and internal reconnection evidently makes the jet spire and the bright emission in the jet base. By examining pre-jet evolutionary changes in line-of-sight SDO/HMI magnetograms while examining concurrent E(UV) images (from SDO/AIA, Solar Orbiter/EUI, and IRIS) of coronal and transition-region emission, we find clear evidence that flux cancelation is the main process that builds pre-jet minifilaments, and is also the main process that triggers the eruptions. In addition to typical coronal jets, we find that small-scale jets (jetlets/network jets) are rooted at the edges of magnetic network lanes, and often come from the sites of flux cancelation. We also compare some of the small-scale observed jets with analogous jets in a Bifrost MHD simulation of a quiet Sun region. Simulations clearly show that jets often come from sites of flux cancelation. From our observations we infer that magnetic reconnection driven flux cancelation is the fundamental process for the buildup and triggering of all sizes of jets.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-3576
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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