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The detection of numerous magnetic separators in a three-dimensional magnetohydrodynamic model of solar emerging flux

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parnell2010astrophysjlettl214.pdf (1.567Mb)
Date
20/12/2010
Author
Parnell, Clare Elizabeth
Maclean, Rhona Claire
Haynes, Andrew Lewis
Keywords
Magnetic fields
Magnetic reconnection
Methods: numerical
Plasmas
Sun: atmosphere
Sun: corona
QC Physics
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Abstract
Magnetic separators in three-dimensional (3D) magnetic fields are believed to be often associated with locations of magnetic reconnection. In this preliminary study, we investigate this relationship using data from a numerical resistive 3D MHD experiment of a solar flux emergence event. For the first time separators are detected in complex magnetic fields resulting from a 3D resistive MHD model of flux emergence. Two snapshots of the model, taken from different stages of its evolution, are analyzed. Numerous separators are found in both snapshots, and their properties, including their geometry, length, relationship to the magnetic null points, and integrated parallel electric field are studied. The separators reside at the junctions between the emerging flux, the overlying field, and two other flux domains that are newly formed by reconnection. The long separators, which connect clusters of nulls that lie either side of the emerging flux, pass through spatially localized regions of high parallel electric field and correspond to local maxima in integrated parallel electric field. These factors indicate that strong magnetic reconnection takes place along many of the separators, and that separators play a key role during the interaction of emerging and overlying flux.
Citation
Parnell , C E , Maclean , R C & Haynes , A L 2010 , ' The detection of numerous magnetic separators in a three-dimensional magnetohydrodynamic model of solar emerging flux ' , Astrophysical Journal Letters , vol. 725 , no. 2 , pp. 214-218 . https://doi.org/10.1088/2041-8205/725/2/L214
Publication
Astrophysical Journal Letters
Status
Peer reviewed
DOI
https://doi.org/10.1088/2041-8205/725/2/L214
ISSN
2041-8205
Type
Journal item
Rights
© 2010. The American Astronomical Society. All rights reserved.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/4739

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