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Pathways of Large-scale Magnetic Couplings Between Solar Coronal Events

Schrijver, C.J.; Title, A.M.; Yeates, A.R.; DeRosa, M.L.

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C.J. Schrijver

A.M. Title

M.L. DeRosa


The high-cadence, comprehensive view of the solar corona by SDO/AIA shows many events that are widely separated in space while occurring close together in time. In some cases, sets of coronal events are evidently causally related, while in many other instances indirect evidence can be found. We present case studies to highlight a variety of coupling processes involved in coronal events. We find that physical linkages between events do occur, but concur with earlier studies that these couplings appear to be crucial to understanding the initiation of major eruptive or explosive phenomena relatively infrequently. We note that the post-eruption reconfiguration timescale of the large-scale corona, estimated from the extreme-ultraviolet afterglow, is on average longer than the mean time between coronal mass ejections (CMEs), so that many CMEs originate from a corona that is still adjusting from a previous event. We argue that the coronal field is intrinsically global: current systems build up over days to months, the relaxation after eruptions continues over many hours, and evolving connections easily span much of a hemisphere. This needs to be reflected in our modeling of the connections from the solar surface into the heliosphere to properly model the solar wind, its perturbations, and the generation and propagation of solar energetic particles. However, the large-scale field cannot be constructed reliably by currently available observational resources. We assess the potential of high-quality observations from beyond Earth's perspective and advanced global modeling to understand the couplings between coronal events in the context of CMEs and solar energetic particle events.


Schrijver, C., Title, A., Yeates, A., & DeRosa, M. (2013). Pathways of Large-scale Magnetic Couplings Between Solar Coronal Events. Astrophysical Journal, 773(2),

Journal Article Type Article
Publication Date Jan 1, 2013
Deposit Date Aug 1, 2013
Publicly Available Date Sep 8, 2014
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 773
Issue 2
Keywords Magnetic fields, Sun: corona, Sun: coronal mass ejections (CMEs), Sun: flares.


Published Journal Article (6.9 Mb)

Copyright Statement
© 2013. The American Astronomical Society. All rights reserved.

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