Solar Active Region Coronal Jets. III. Hidden-onset Jets
Solar quiet- and coronal-hole region coronal jets frequently clearly originate from erupting minifilaments, but active-region jets often lack an obvious erupting-minifilament source. We observe a coronal-jet-productive active region (AR), AR 12824, over 2021 May 22 0–8 UT, primarily using Solar Dyna...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acff6b |
| _version_ | 1797364571507261440 |
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| author | Alphonse C. Sterling Ronald L. Moore Navdeep K. Panesar |
| author_facet | Alphonse C. Sterling Ronald L. Moore Navdeep K. Panesar |
| author_sort | Alphonse C. Sterling |
| collection | DOAJ |
| description | Solar quiet- and coronal-hole region coronal jets frequently clearly originate from erupting minifilaments, but active-region jets often lack an obvious erupting-minifilament source. We observe a coronal-jet-productive active region (AR), AR 12824, over 2021 May 22 0–8 UT, primarily using Solar Dynamics Observatory (SDO) Atmospheric Imaging Array (AIA) EUV images and SDO/Helioseismic and Magnetic Imager magnetograms. Jets were concentrated in two locations in the AR: on the south side and on the northwest side of the AR’s lone large sunspot. The south-location jets are oriented so that we have a clear view of the jets’ origin low in the atmosphere: their source is clearly minifilaments erupting from locations showing magnetic flux changes/cancelations. After erupting a projected distance ≲5″ away from their origin site, the minifilaments erupt outward onto far-reaching field as part of the jet’s spire, quickly losing their minifilament character. In contrast, the northwest-location jets show no clear erupting minifilament, but the source site of those jets are obscured along our line of sight by absorbing chromospheric material. EUV and magnetic data indicate that the likely source sites were ≳15″ from where the we first see the jet spire; thus, an erupting minifilament would likely lose its minifilament character before we first see the spire. We conclude that such AR jets could work like non-AR jets, but the erupting-minifilament jet source is often hidden by obscuring material. Another factor is that magnetic eruptions making some AR jets carry only a harder-to-detect comparatively thin (∼1″–2″) minifilament “strand.” |
| first_indexed | 2024-03-08T16:37:10Z |
| format | Article |
| id | doaj.art-5dd29adb4a7f45daabb37e8d45aa46cd |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T16:37:10Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-5dd29adb4a7f45daabb37e8d45aa46cd2024-01-05T14:02:30ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01960210910.3847/1538-4357/acff6bSolar Active Region Coronal Jets. III. Hidden-onset JetsAlphonse C. Sterling0https://orcid.org/0000-0003-1281-897XRonald L. Moore1https://orcid.org/0000-0002-5691-6152Navdeep K. Panesar2https://orcid.org/0000-0001-7620-362XNASA/Marshall Space Flight Center , Huntsville, AL 35812, USANASA/Marshall Space Flight Center , Huntsville, AL 35812, USA; Center for Space Plasma and Aeronomic Research, University of Alabama in Huntsville , Huntsville, AL 35805, USABay Area Environmental Research Institute, NASA Research Park , Moffett Field, CA 94035, USA; Lockheed Martin Solar and Astrophysics Laboratory , 3251 Hanover Street, Building 252, Palo Alto, CA 94304, USASolar quiet- and coronal-hole region coronal jets frequently clearly originate from erupting minifilaments, but active-region jets often lack an obvious erupting-minifilament source. We observe a coronal-jet-productive active region (AR), AR 12824, over 2021 May 22 0–8 UT, primarily using Solar Dynamics Observatory (SDO) Atmospheric Imaging Array (AIA) EUV images and SDO/Helioseismic and Magnetic Imager magnetograms. Jets were concentrated in two locations in the AR: on the south side and on the northwest side of the AR’s lone large sunspot. The south-location jets are oriented so that we have a clear view of the jets’ origin low in the atmosphere: their source is clearly minifilaments erupting from locations showing magnetic flux changes/cancelations. After erupting a projected distance ≲5″ away from their origin site, the minifilaments erupt outward onto far-reaching field as part of the jet’s spire, quickly losing their minifilament character. In contrast, the northwest-location jets show no clear erupting minifilament, but the source site of those jets are obscured along our line of sight by absorbing chromospheric material. EUV and magnetic data indicate that the likely source sites were ≳15″ from where the we first see the jet spire; thus, an erupting minifilament would likely lose its minifilament character before we first see the spire. We conclude that such AR jets could work like non-AR jets, but the erupting-minifilament jet source is often hidden by obscuring material. Another factor is that magnetic eruptions making some AR jets carry only a harder-to-detect comparatively thin (∼1″–2″) minifilament “strand.”https://doi.org/10.3847/1538-4357/acff6bSolar filament eruptionsSolar extreme ultraviolet emissionSolar active regionsSolar active region magnetic fields |
| spellingShingle | Alphonse C. Sterling Ronald L. Moore Navdeep K. Panesar Solar Active Region Coronal Jets. III. Hidden-onset Jets The Astrophysical Journal Solar filament eruptions Solar extreme ultraviolet emission Solar active regions Solar active region magnetic fields |
| title | Solar Active Region Coronal Jets. III. Hidden-onset Jets |
| title_full | Solar Active Region Coronal Jets. III. Hidden-onset Jets |
| title_fullStr | Solar Active Region Coronal Jets. III. Hidden-onset Jets |
| title_full_unstemmed | Solar Active Region Coronal Jets. III. Hidden-onset Jets |
| title_short | Solar Active Region Coronal Jets. III. Hidden-onset Jets |
| title_sort | solar active region coronal jets iii hidden onset jets |
| topic | Solar filament eruptions Solar extreme ultraviolet emission Solar active regions Solar active region magnetic fields |
| url | https://doi.org/10.3847/1538-4357/acff6b |
| work_keys_str_mv | AT alphonsecsterling solaractiveregioncoronaljetsiiihiddenonsetjets AT ronaldlmoore solaractiveregioncoronaljetsiiihiddenonsetjets AT navdeepkpanesar solaractiveregioncoronaljetsiiihiddenonsetjets |