Vortex and Sink Flows in Eruptive Flares as a Model for Coronal Implosions

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00481203" target="_blank" >RIV/67985815:_____/17:00481203 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3847/1538-4357/aa6110" target="_blank" >http://dx.doi.org/10.3847/1538-4357/aa6110</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/aa6110" target="_blank" >10.3847/1538-4357/aa6110</a>

Result language
angličtina
Original language name
Vortex and Sink Flows in Eruptive Flares as a Model for Coronal Implosions
Original language description
Eruptive flares are sudden releases of magnetic energy that involve many phenomena, several of which can be explained by the standard 2D flare model and its realizations in 3D. We analyze a 3D magnetohydrodynamics simulation, in the framework of this model, that naturally explains the contraction of coronal loops in the proximity of the flare sites, as well as the inflow toward the region above the cusp-shaped loops. We find that two vorticity arcs located along the flanks of the erupting magnetic flux rope are generated as soon as the eruption begins. The magnetic arcades above the flux rope legs are then subjected to expansion, rotation, or contraction depending on which part of the vortex flow advects them. In addition to the vortices, an inward-directed magnetic pressure gradient exists in the current sheet below the magnetic flux rope. It results in the formation of a sink that is maintained by reconnection. We conclude that coronal loop apparent implosions observed during eruptive flares are the result of hydromagnetic effects related to the generation of vortex and sink flows when a flux rope moves in a magnetized environment.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GA17-16447S" target="_blank" >GA17-16447S: Slipping magnetic reconnection in solar flares: multi-spectral analysis, dynamics, and non-thermal cooling simulations</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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