On the Quasi‐Three Dimensional Configuration of Magnetic Clouds
Abstract We develop an optimization approach to model the magnetic field configuration of magnetic clouds, based on a linear force‐free formulation in three dimensions. Such a solution, dubbed the Freidberg solution, is kin to the axisymmetric Lundquist solution, but with more general “helical symme...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2020GL090630 |
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| _version_ | 1849736047672426496 |
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| author | Qiang Hu Wen He Jiong Qiu Angelos Vourlidas Chunming Zhu |
| author_facet | Qiang Hu Wen He Jiong Qiu Angelos Vourlidas Chunming Zhu |
| author_sort | Qiang Hu |
| collection | DOAJ |
| description | Abstract We develop an optimization approach to model the magnetic field configuration of magnetic clouds, based on a linear force‐free formulation in three dimensions. Such a solution, dubbed the Freidberg solution, is kin to the axisymmetric Lundquist solution, but with more general “helical symmetry.” The merit of our approach is demonstrated via its application to two case studies of in situ measured magnetic clouds. Both yield results of reduced χ2 ≈ 1. Case 1 shows a winding flux rope configuration with one major polarity. Case 2 exhibits a double‐helix configuration with two flux bundles winding around each other and rooted on regions of mixed polarities. This study demonstrates the three‐dimensional complexity of the magnetic cloud structures. |
| format | Article |
| id | doaj-art-c8cd5ad2a90f462ea353e6ed99a70354 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-c8cd5ad2a90f462ea353e6ed99a703542025-08-20T03:07:23ZengWileyGeophysical Research Letters0094-82761944-80072021-01-01482n/an/a10.1029/2020GL090630On the Quasi‐Three Dimensional Configuration of Magnetic CloudsQiang Hu0Wen He1Jiong Qiu2Angelos Vourlidas3Chunming Zhu4Department of Space Science, and Center for Space Plasma and Aeronomic Research (CSPAR) The University of Alabama in Huntsville Huntsville AL USADepartment of Space Science The University of Alabama in Huntsville Huntsville AL USAPhysics Department Montana State University Bozeman MT USAJohns Hopkins University Applied Physics Laboratory Laurel MD USAPhysics Department Montana State University Bozeman MT USAAbstract We develop an optimization approach to model the magnetic field configuration of magnetic clouds, based on a linear force‐free formulation in three dimensions. Such a solution, dubbed the Freidberg solution, is kin to the axisymmetric Lundquist solution, but with more general “helical symmetry.” The merit of our approach is demonstrated via its application to two case studies of in situ measured magnetic clouds. Both yield results of reduced χ2 ≈ 1. Case 1 shows a winding flux rope configuration with one major polarity. Case 2 exhibits a double‐helix configuration with two flux bundles winding around each other and rooted on regions of mixed polarities. This study demonstrates the three‐dimensional complexity of the magnetic cloud structures.https://doi.org/10.1029/2020GL090630 |
| spellingShingle | Qiang Hu Wen He Jiong Qiu Angelos Vourlidas Chunming Zhu On the Quasi‐Three Dimensional Configuration of Magnetic Clouds Geophysical Research Letters |
| title | On the Quasi‐Three Dimensional Configuration of Magnetic Clouds |
| title_full | On the Quasi‐Three Dimensional Configuration of Magnetic Clouds |
| title_fullStr | On the Quasi‐Three Dimensional Configuration of Magnetic Clouds |
| title_full_unstemmed | On the Quasi‐Three Dimensional Configuration of Magnetic Clouds |
| title_short | On the Quasi‐Three Dimensional Configuration of Magnetic Clouds |
| title_sort | on the quasi three dimensional configuration of magnetic clouds |
| url | https://doi.org/10.1029/2020GL090630 |
| work_keys_str_mv | AT qianghu onthequasithreedimensionalconfigurationofmagneticclouds AT wenhe onthequasithreedimensionalconfigurationofmagneticclouds AT jiongqiu onthequasithreedimensionalconfigurationofmagneticclouds AT angelosvourlidas onthequasithreedimensionalconfigurationofmagneticclouds AT chunmingzhu onthequasithreedimensionalconfigurationofmagneticclouds |