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Helicity and Filament Channels? The Straight Twist!One of the most important and most puzzling features of the coronal magnetic field is that it appears to have smooth magnetic structure with little evidence for non-potentiality except at special locations, photospheric polarity inversions lines where the non-potentiality is observed as a filament channel. This characteristic feature of the closed-field corona is highly unexpected given that photospheric motions continuously tangle its magnetic field. Although reconnection can eliminate some of the injected structure, it cannot destroy the helicity, which should build up to produce observable complexity. We propose that an inverse cascade process transports the injected helicity from the interior of closed flux regions to their boundaries, polarity inversion lines, creating filament channels. We describe how the helicity is injected and transported and calculate the relevant rates. We argue that one process, helicity transport, can explain both the observed lack and presence of structure in the coronal magnetic field.
Document ID
Document Type
Conference Paper
Antiochos, Spiro K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
August 9, 2010
Subject Category
Solar Physics
Meeting Information
Meeting: The Solar Flare Magnetic Fields and Plasmas: Honoring the Contributions of Dick Canfield Workshop
Location: Boulder, CO
Country: United States
Start Date: August 9, 2010
End Date: August 11, 2010
Distribution Limits
Work of the US Gov. Public Use Permitted.

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