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  Formation and dynamics of a solar eruptive flux tube

Inoue, S., Kusano, K., Büchner, J., & Skála, J. (2018). Formation and dynamics of a solar eruptive flux tube. Nature Communications, 9: 174. doi:10.1038/s41467-017-02616-8.

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 Creators:
Inoue, Satoshi, Author
Kusano, Kanya, Author
Büchner, Jörg1, Author              
Skála, Jan, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 MPIS_GROUPS: Sun and Heliosphere
 MPIS_PROJECTS: Theory: Sim Sol Sys Plasma
 Abstract: Solar eruptions are well-known drivers of extreme space weather, which can greatly disturb the Earth’s magnetosphere and ionosphere. The triggering process and initial dynamics of these eruptions are still an area of intense study. Here we perform a magnetohydrodynamic simulation taking into account the observed photospheric magnetic field to reveal the dynamics of a solar eruption in a real magnetic environment. In our simulation, we confirmed that tether-cutting reconnection occurring locally above the polarity inversion line creates a twisted flux tube, which is lifted into a toroidal unstable area where it loses equilibrium, destroying the force-free state, and driving the eruption. Consequently, a more highly twisted flux tube is built up during this initial phase, which can be further accelerated even when it returns to a stable area. We suggest that a nonlinear positive feedback process between the flux tube evolution and reconnection is the key to ensure this extra acceleration.

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Language(s): eng - English
 Dates: 2018-03-192018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/s41467-017-02616-8
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 9 Sequence Number: 174 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723