Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System
Nested ring-shaped line-of-sight (LOS) oriented flows in coronal cavities have been observed in recent years but rarely explained. Using a magnetohydrodynamic simulation of a prominence-cavity system, we investigate the relationship between the simulated field-aligned flows, magnetic reconnection fl...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acca82 |
| _version_ | 1797698819325952000 |
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| author | Tie Liu Yingna Su Yang Guo Jie Zhao Haisheng Ji |
| author_facet | Tie Liu Yingna Su Yang Guo Jie Zhao Haisheng Ji |
| author_sort | Tie Liu |
| collection | DOAJ |
| description | Nested ring-shaped line-of-sight (LOS) oriented flows in coronal cavities have been observed in recent years but rarely explained. Using a magnetohydrodynamic simulation of a prominence-cavity system, we investigate the relationship between the simulated field-aligned flows, magnetic reconnection flows, and the LOS-oriented flows observed by the Coronal Multi-Channel Polarimeter. The field-aligned flows are along magnetic field lines toward the dips and driven by the hydrodynamic forces exerted by the prominence condensation. The reconnection flows are driven by the overlying reconnection and tether-cutting reconnection. The velocity of the reconnection flows increases from the quasi-static phase to the fast-rise phase, reaching several kilometers per second, which is similar to the speed of the field-aligned flows. We calculate the synthetic Doppler images by forward modeling and compare them with the observed LOS-oriented flows. The synthetic images show that the LOS-oriented flows of one ring with opposite internal flow driven by the field-aligned flows are identified in the simulation. And the synthetic images integrated along three different LOSs can resemble the observed direction reversal of the LOS-oriented flow in about 20 hr, when the included angle of two adjacent LOSs is about 10°. These results suggest that the observed LOS-oriented flows of one ring with an opposite internal flow may be explained by the LOS integration effect of field-aligned flows along different loops. |
| first_indexed | 2024-03-12T03:59:32Z |
| format | Article |
| id | doaj.art-453dd194a965459a9c6f59b874f50ff0 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T03:59:32Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-453dd194a965459a9c6f59b874f50ff02023-09-03T11:44:29ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0194923610.3847/1538-4357/acca82Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity SystemTie Liu0https://orcid.org/0000-0001-7385-4742Yingna Su1https://orcid.org/0000-0001-9647-2149Yang Guo2https://orcid.org/0000-0002-9293-8439Jie Zhao3https://orcid.org/0000-0003-3160-4379Haisheng Ji4https://orcid.org/0000-0002-5898-2284School of Astronomy and Space Science, Nanjing University , Nanjing, 210023, People's Republic of China ; liu_tie_zimu@nju.edu.cn; Key Laboratory for Modern Astronomy and Astrophysics, Nanjing University , Ministry of Education, Nanjing, 210023, People's Republic of ChinaKey Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, CAS , Nanjing 210023, People's Republic of China; School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of ChinaSchool of Astronomy and Space Science, Nanjing University , Nanjing, 210023, People's Republic of China ; liu_tie_zimu@nju.edu.cn; Key Laboratory for Modern Astronomy and Astrophysics, Nanjing University , Ministry of Education, Nanjing, 210023, People's Republic of ChinaKey Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, CAS , Nanjing 210023, People's Republic of China; School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of ChinaKey Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, CAS , Nanjing 210023, People's Republic of China; School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of ChinaNested ring-shaped line-of-sight (LOS) oriented flows in coronal cavities have been observed in recent years but rarely explained. Using a magnetohydrodynamic simulation of a prominence-cavity system, we investigate the relationship between the simulated field-aligned flows, magnetic reconnection flows, and the LOS-oriented flows observed by the Coronal Multi-Channel Polarimeter. The field-aligned flows are along magnetic field lines toward the dips and driven by the hydrodynamic forces exerted by the prominence condensation. The reconnection flows are driven by the overlying reconnection and tether-cutting reconnection. The velocity of the reconnection flows increases from the quasi-static phase to the fast-rise phase, reaching several kilometers per second, which is similar to the speed of the field-aligned flows. We calculate the synthetic Doppler images by forward modeling and compare them with the observed LOS-oriented flows. The synthetic images show that the LOS-oriented flows of one ring with opposite internal flow driven by the field-aligned flows are identified in the simulation. And the synthetic images integrated along three different LOSs can resemble the observed direction reversal of the LOS-oriented flow in about 20 hr, when the included angle of two adjacent LOSs is about 10°. These results suggest that the observed LOS-oriented flows of one ring with an opposite internal flow may be explained by the LOS integration effect of field-aligned flows along different loops.https://doi.org/10.3847/1538-4357/acca82Magnetohydrodynamical simulationsSolar magnetic reconnectionSolar magnetic fieldsSolar prominences |
| spellingShingle | Tie Liu Yingna Su Yang Guo Jie Zhao Haisheng Ji Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System The Astrophysical Journal Magnetohydrodynamical simulations Solar magnetic reconnection Solar magnetic fields Solar prominences |
| title | Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System |
| title_full | Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System |
| title_fullStr | Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System |
| title_full_unstemmed | Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System |
| title_short | Field-aligned and Magnetic Reconnection Flows in a Magnetohydrodynamic Simulation of Prominence-cavity System |
| title_sort | field aligned and magnetic reconnection flows in a magnetohydrodynamic simulation of prominence cavity system |
| topic | Magnetohydrodynamical simulations Solar magnetic reconnection Solar magnetic fields Solar prominences |
| url | https://doi.org/10.3847/1538-4357/acca82 |
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