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On the nature of reconnection at a solar coronal null point above a separatrix dome

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pontin2013astrophysj154.pdf (2.128Mb)
Date
10/09/2013
Author
Pontin, D. I.
Priest, E. R.
Galsgaard, K.
Keywords
Magnetic reconnection
Magnetohydrodynamics (MHD)
Sun: corona
Sun: magnetic fields
3-dimensional magnetic reconnection
Kinematic reconnection
Flux emergence
Current sheets
Topology
Field
Dynamics
Collapse
Flare
Spine
QC Physics
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Abstract
Three-dimensional magnetic null points are ubiquitous in the solar corona and in any generic mixed-polarity magnetic field. We consider magnetic reconnection at an isolated coronal null point whose fan field lines form a dome structure. Using analytical and computational models, we demonstrate several features of spine-fan reconnection at such a null, including the fact that substantial magnetic flux transfer from one region of field line connectivity to another can occur. The flux transfer occurs across the current sheet that forms around the null point during spine-fan reconnection, and there is no separator present. Also, flipping of magnetic field lines takes place in a manner similar to that observed in the quasi-separatrix layer or slip-running reconnection.
Citation
Pontin , D I , Priest , E R & Galsgaard , K 2013 , ' On the nature of reconnection at a solar coronal null point above a separatrix dome ' , Astrophysical Journal , vol. 774 , no. 2 , 154 . https://doi.org/10.1088/0004-637X/774/2/154
Publication
Astrophysical Journal
Status
Peer reviewed
DOI
https://doi.org/10.1088/0004-637X/774/2/154
ISSN
0004-637X
Type
Journal article
Rights
© 2013. The American Astronomical Society. All rights reserved
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5459

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