تقرير
From Pseudostreamer Jets to Coronal Mass Ejections:: Observations of the Breakout Continuum
| العنوان: | From Pseudostreamer Jets to Coronal Mass Ejections:: Observations of the Breakout Continuum |
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| المؤلفون: | Pankaj Kumar, Judith T Karpen, Spiro K Antiochos, Peter F Wyper, C Richard DeVore, Benjamin J Lynch |
| المصدر: | Astrophysical Journal. 907(1) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Solar Physics |
| الوصف: | The magnetic breakout model, in which reconnection in the corona leads to destabilization of a filament channel, explains numerous features of eruptive solar events, from small-scale jets to global-scale coronal mass ejections (CMEs). The underlying multipolar topology, pre-eruption activities, and sequence of magnetic-reconnection onsets (first breakout, then flare) of many observed fast CMEs/eruptive flares are fully consistent with the model. Recently, we have demonstrated that most observed coronal-hole jets in fan/spine topologies also are induced by breakout reconnection at the null point above a filament channel (with or without a filament).For these two types of eruptions occurring in similar topologies, the key question is, why do some events generate jets while others form CMEs? We focused on the initiation of eruptions in large bright points/small active regions that were located in coronal holes and clearly exhibited null-point (fan/spine) topologies: such configurations are referred to as pseudostreamers. We analyzed and compared SDO/AIA,SOHO/LASCO, and RHESSI observations of three events. Our analysis of the events revealed two new observable signatures of breakout reconnection prior to the explosive jet/CME outflows and flare onset: coronal dimming and the opening-up of field lines above the breakout current sheet. Most key properties were similar among the selected erupting structures, thereby eliminating region size, photospheric field strength, magnetic configuration, and pre-eruptive evolution as discriminating factors between jets and CMEs. We consider the factors that contribute to the different types of dynamic behavior, and conclude that the determining factor is the ratio of the magnetic free energy associated with the filament channel compared to the energy associated with the overlying flux inside and outside the pseudostreamer dome. Our results imply that a pseudostreamer eruption must be fast in order to produce an interplanetary CME. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1538-4357 0004-637X |
| DOI: | 10.3847/1538-4357/abca8b |
| URL الوصول: | https://ntrs.nasa.gov/citations/20205010954 |
| ملاحظات: | 955518.02.05.01.01 80NSSC20K0812 GSFC - 670.0 GRANT NNG11PL10A 80NSSC18K0645 |
| رقم الأكسشن: | edsnas.20205010954 |
| قاعدة البيانات: | NASA Technical Reports |
| تدمد: | 15384357 0004637X |
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| DOI: | 10.3847/1538-4357/abca8b |