Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope
Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which such eruptions occur. These simulations to date h...
| 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 |
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| Online Access: | https://doi.org/10.3847/1538-4357/ad1826 |
| _version_ | 1797306744219631616 |
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| author | T. Török M. G. Linton J. E. Leake Z. Mikić R. Lionello V. S. Titov C. Downs |
| author_facet | T. Török M. G. Linton J. E. Leake Z. Mikić R. Lionello V. S. Titov C. Downs |
| author_sort | T. Török |
| collection | DOAJ |
| description | Observations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which such eruptions occur. These simulations to date have modeled filament channels as 2D flux ropes or 3D uniformly sheared arcades. Here we present MHD simulations of flux emergence into a more realistic configuration consisting of a bipolar active region containing a line-tied 3D flux rope. We use the coronal flux-rope model of Titov et al. as the initial condition and drive our simulations by imposing boundary conditions extracted from a flux emergence simulation by Leake et al. We identify three mechanisms that determine the evolution of the system: (i) reconnection displacing footpoints of field lines overlying the coronal flux rope, (ii) changes of the ambient field due to the intrusion of new flux at the boundary, and (iii) interaction of the (axial) electric currents in the preexisting and newly emerging flux systems. The relative contributions and effects of these mechanisms depend on the properties of the preexisting and emerging flux systems. Here we focus on the location and orientation of the emerging flux relative to the coronal flux rope. Varying these parameters, we investigate under which conditions an eruption of the latter is triggered. |
| first_indexed | 2024-03-08T00:46:17Z |
| format | Article |
| id | doaj.art-9906d060d5064f439832835f2f8a3fcd |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-08T00:46:17Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-9906d060d5064f439832835f2f8a3fcd2024-02-15T09:41:18ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01962214910.3847/1538-4357/ad1826Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux RopeT. Török0https://orcid.org/0000-0003-3843-3242M. G. Linton1https://orcid.org/0000-0002-4459-7510J. E. Leake2https://orcid.org/0000-0003-0072-4634Z. Mikić3https://orcid.org/0000-0002-3164-930XR. Lionello4https://orcid.org/0000-0001-9231-045XV. S. Titov5https://orcid.org/0000-0001-7053-4081C. Downs6https://orcid.org/0000-0003-1759-4354Predictive Science Inc. , 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121, USA ; tibor@predsci.comU.S. Naval Research Lab , 4555 Overlook Avenue SW, Washington, DC 20375, USANASA Goddard Space Flight Center , Greenbelt, MD 20771, USAPredictive Science Inc. , 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121, USA ; tibor@predsci.comPredictive Science Inc. , 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121, USA ; tibor@predsci.comPredictive Science Inc. , 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121, USA ; tibor@predsci.comPredictive Science Inc. , 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121, USA ; tibor@predsci.comObservations have shown a clear association of filament/prominence eruptions with the emergence of magnetic flux in or near filament channels. Magnetohydrodynamic (MHD) simulations have been employed to systematically study the conditions under which such eruptions occur. These simulations to date have modeled filament channels as 2D flux ropes or 3D uniformly sheared arcades. Here we present MHD simulations of flux emergence into a more realistic configuration consisting of a bipolar active region containing a line-tied 3D flux rope. We use the coronal flux-rope model of Titov et al. as the initial condition and drive our simulations by imposing boundary conditions extracted from a flux emergence simulation by Leake et al. We identify three mechanisms that determine the evolution of the system: (i) reconnection displacing footpoints of field lines overlying the coronal flux rope, (ii) changes of the ambient field due to the intrusion of new flux at the boundary, and (iii) interaction of the (axial) electric currents in the preexisting and newly emerging flux systems. The relative contributions and effects of these mechanisms depend on the properties of the preexisting and emerging flux systems. Here we focus on the location and orientation of the emerging flux relative to the coronal flux rope. Varying these parameters, we investigate under which conditions an eruption of the latter is triggered.https://doi.org/10.3847/1538-4357/ad1826Solar physicsSolar magnetic fieldsSolar magnetic flux emergenceSolar coronal mass ejections |
| spellingShingle | T. Török M. G. Linton J. E. Leake Z. Mikić R. Lionello V. S. Titov C. Downs Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope The Astrophysical Journal Solar physics Solar magnetic fields Solar magnetic flux emergence Solar coronal mass ejections |
| title | Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope |
| title_full | Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope |
| title_fullStr | Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope |
| title_full_unstemmed | Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope |
| title_short | Solar Eruptions Triggered by Flux Emergence below or near a Coronal Flux Rope |
| title_sort | solar eruptions triggered by flux emergence below or near a coronal flux rope |
| topic | Solar physics Solar magnetic fields Solar magnetic flux emergence Solar coronal mass ejections |
| url | https://doi.org/10.3847/1538-4357/ad1826 |
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