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Buildup of a highly twisted magnetic flux rope during a solar eruption
The magnetic flux rope is among the most fundamental magnetic configurations in plasma. Although its presence after solar eruptions has been verified by spacecraft measurements near Earth, its formation on the Sun remains elusive, yet is critical to understanding a broad spectrum of phenomena. Here...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5673903/ https://www.ncbi.nlm.nih.gov/pubmed/29109441 http://dx.doi.org/10.1038/s41467-017-01207-x |
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author | Wang, Wensi Liu, Rui Wang, Yuming Hu, Qiang Shen, Chenglong Jiang, Chaowei Zhu, Chunming |
author_facet | Wang, Wensi Liu, Rui Wang, Yuming Hu, Qiang Shen, Chenglong Jiang, Chaowei Zhu, Chunming |
author_sort | Wang, Wensi |
collection | PubMed |
description | The magnetic flux rope is among the most fundamental magnetic configurations in plasma. Although its presence after solar eruptions has been verified by spacecraft measurements near Earth, its formation on the Sun remains elusive, yet is critical to understanding a broad spectrum of phenomena. Here we study the dynamic formation of a magnetic flux rope during a classic two-ribbon flare. Its feet are identified unambiguously with conjugate coronal dimmings completely enclosed by irregular bright rings, which originate and expand outward from the far ends of flare ribbons. The expansion is associated with the rapid ribbon separation during the flare main phase. Counting magnetic flux through the feet and the ribbon-swept area reveals that the rope’s core is more twisted than its average of four turns. It propagates to the Earth as a typical magnetic cloud possessing a similar twist profile obtained by the Grad-Shafranov reconstruction of its three dimensional structure. |
format | Online Article Text |
id | pubmed-5673903 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56739032017-11-09 Buildup of a highly twisted magnetic flux rope during a solar eruption Wang, Wensi Liu, Rui Wang, Yuming Hu, Qiang Shen, Chenglong Jiang, Chaowei Zhu, Chunming Nat Commun Article The magnetic flux rope is among the most fundamental magnetic configurations in plasma. Although its presence after solar eruptions has been verified by spacecraft measurements near Earth, its formation on the Sun remains elusive, yet is critical to understanding a broad spectrum of phenomena. Here we study the dynamic formation of a magnetic flux rope during a classic two-ribbon flare. Its feet are identified unambiguously with conjugate coronal dimmings completely enclosed by irregular bright rings, which originate and expand outward from the far ends of flare ribbons. The expansion is associated with the rapid ribbon separation during the flare main phase. Counting magnetic flux through the feet and the ribbon-swept area reveals that the rope’s core is more twisted than its average of four turns. It propagates to the Earth as a typical magnetic cloud possessing a similar twist profile obtained by the Grad-Shafranov reconstruction of its three dimensional structure. Nature Publishing Group UK 2017-11-06 /pmc/articles/PMC5673903/ /pubmed/29109441 http://dx.doi.org/10.1038/s41467-017-01207-x Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Wang, Wensi Liu, Rui Wang, Yuming Hu, Qiang Shen, Chenglong Jiang, Chaowei Zhu, Chunming Buildup of a highly twisted magnetic flux rope during a solar eruption |
title | Buildup of a highly twisted magnetic flux rope during a solar eruption |
title_full | Buildup of a highly twisted magnetic flux rope during a solar eruption |
title_fullStr | Buildup of a highly twisted magnetic flux rope during a solar eruption |
title_full_unstemmed | Buildup of a highly twisted magnetic flux rope during a solar eruption |
title_short | Buildup of a highly twisted magnetic flux rope during a solar eruption |
title_sort | buildup of a highly twisted magnetic flux rope during a solar eruption |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5673903/ https://www.ncbi.nlm.nih.gov/pubmed/29109441 http://dx.doi.org/10.1038/s41467-017-01207-x |
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