Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

Pathways of large-scale magnetic couplings between solar coronal events.

Schrijver, C.J. and Title, A.M. and Yeates, A.R. and DeRosa, M.L. (2013) 'Pathways of large-scale magnetic couplings between solar coronal events.', Astrophysical journal., 773 (2). p. 93.

Abstract

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.

Item Type:Article
Keywords:Magnetic fields, Sun: corona, Sun: coronal mass ejections (CMEs), Sun: flares.
Full text:(VoR) Version of Record
Download PDF
(6768Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1088/0004-637X/773/2/93
Publisher statement:© 2013. The American Astronomical Society. All rights reserved.
Date accepted:No date available
Date deposited:08 September 2014
Date of first online publication:2013
Date first made open access:No date available

Save or Share this output

Export:
Export
Look up in GoogleScholar