Open AccessJournal Article
Evidence for magnetic reconnection in solar flares
Pascal Démoulin,L. van Driel-Gesztelyi,Brigitte Schmieder,J. C. Hemoux,G. Csepura,Mona J. Hagyard +5 more
TLDR
In this article, the magnetic field topology in an active region was studied for three consecutive days, June 13-15 1980, and evidence was derived that solar flares are produced by magnetic reconnection.Abstract:
From a study of the magnetic field topology in an active region, evidence is derived that solar flares are produced by magnetic reconnection. We study a complex group with two active regions (AR 2511 and AR 2512) for three consecutive days, June 13-15 1980. The observed longitudinal magnetic field is used to model the coronal magnetic field by the potential field created by a series of magnetic charges. This computed field matches satisfactorily the Hα fibrils and the observed transverse field direction. A set of flares occurs principally in the northern group (AR 2511). During these three days, two different magnetic configurations in succession are responsible for the occurrence of these flares: first the intrusion of a new opposite flux in the following polarity, secondly the emergence of new flux between the main polaritiesread more
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Journal ArticleDOI
An Observational Overview of Solar Flares
Lyndsay Fletcher,Brian R. Dennis,Hugh S. Hudson,Säm Krucker,K. J. H. Phillips,Astrid Veronig,Marina Battaglia,L. Bone,Amir Caspi,Qingrong Chen,Peter T. Gallagher,P. T. Grigis,Haisheng Ji,Haisheng Ji,Wei Liu,Wei Liu,Ryan O. Milligan,Manuela Temmer +17 more
TL;DR: An overview of solar flares and associated phenomena, drawing upon a wide range of observational data primarily from the RHESSI era, is presented in this paper, where the focus is on different areas of flare phenomena (footpoints and ribbons, coronal sources, relationship to coronal mass ejections) and their interconnections.
Journal ArticleDOI
Three-dimensional magnetic reconnection without null points: 1. Basic theory of magnetic flipping
Eric Priest,Pascal Démoulin +1 more
TL;DR: In this paper, the authors show that magnetic reconnection may also occur in three dimensions in the absence of neutral points at so-called quasi-separatrix layers, where there is a steep gradient in field line linkage.
Journal ArticleDOI
Topological Methods for the Analysis of Solar Magnetic Fields
TL;DR: A number of powerful techniques have been developed to characterize the response of the solar coronal magnetic field by describing its topology as mentioned in this paper, such as separatrices, null points or bald patches.
Journal ArticleDOI
Topology and current ribbons: A model for current, reconnection and flaring in a complex, evolving corona
TL;DR: The minimum current corona (MCC) model as discussed by the authors approximates the current arising on a separator in response to displacement of photospheric flux, which allows a model of the quasi-static evolution of the corona above a complex active region.
Journal ArticleDOI
Three-dimensional null point reconnection regimes
Eric Priest,David Pontin +1 more
TL;DR: In this paper, a division of magnetic reconnection at three-dimensional null points is proposed, depending on the nature of the flow near the spine and fan of the null point, where the spine is an isolated field line which approaches the null and the fan is a surface of field lines which recede from it (or approach it).