Journal ArticleDOI
Magnetic reconnection in the corona and the loop prominence phenomenon
Roger A. Kopp,G. W. Pneuman +1 more
TLDR
In this article, the authors examined the theoretical consequences to be expected during the extended relaxation phase which must follow such events, characterized by a gradual reconnection of the outward-distended field lines.Abstract:
Many classes of transient solar phenomena, such as flares, flare sprays, and eruptive prominences, cause major disruptions in the magnetic geometry of the overlying corona. Typically, the results from Skylab indicate that pre-existing closed magnetic loops in the corona are torn open by the force of the disruption. We examine here some of the theoretical consequences to be expected during the extended relaxation phase which must follow such events. This phase is characterized by a gradual reconnection of the outward-distended field lines. In particular, the enhanced coronal expansion which occurs on open field lines just before they reconnect appears adequate to supply the large downward mass fluxes observed in Ha loop prominence systems that form during the post-transient relaxation. In addition, this enhanced flow may produce nonrecurrent high speed streams in the solar wind after such events. Calculations of the relaxation phase for representative field geometries and the resulting flow configurations are described.read more
Citations
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Journal ArticleDOI
A loop-top hard X-ray source in a compact solar flare as evidence for magnetic reconnection
TL;DR: In this paper, the authors identify the reconnection region as the site of particle acceleration, suggesting that the basic physics of the magnetic reconnection process may be common to both types of flares.
Journal ArticleDOI
The solar flare myth
TL;DR: In this paper, the authors outline a different paradigm of cause and effect that removes solar flares from their central position in the chain of events leading from the Sun to near-Earth space.
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
Coronal Mass Ejections: Models and Their Observational Basis
TL;DR: In this paper, a review on each stage of the CME phenomenon is presented, including their pre-eruption structure, their triggering mechanisms and the precursors indicating the initiation process, their acceleration and propagation.
Journal ArticleDOI
Solar Flares: Magnetohydrodynamic Processes
Kazunari Shibata,Tetsuya Magara +1 more
TL;DR: The current understanding of solar flares, mainly focused on magnetohydrodynamic (MHD) processes responsible for producing a flare, can be found in this article, where the authors present a review of the models proposed to explain the physical mechanism of flares, giving an comprehensive explanation of the key processes.
References
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Journal ArticleDOI
Gas-magnetic field interactions in the solar corona
G. W. Pneuman,Roger A. Kopp +1 more
TL;DR: In this paper, it is shown from eclipse photographs that gas-magnetic field interactions are important in determining the structure and dynamical properties of the solar corona and interplanetary medium.
Journal ArticleDOI
Ionization equilibrium and radiative cooling of a low-density plasma.
Donald P. Cox,Wallace H. Tucker +1 more
TL;DR: Ionization equilibrium and radiative cooling of high temperature low density plasma, noting cosmic gas cooling curve of line emission from oxygen ion transitions, were discussed in this paper, where the authors also showed that the line emission of oxygen ion transition can be seen as a sign of low-density plasma.
Journal ArticleDOI
Dynamical behavior of thermal protons in the mid-latitude ionosphere and magnetosphere
TL;DR: In this article, the authors show that the mid-latitude ionosphere may be in a continual dynamic state if the storms occur sufficiently often and that the density and flux profiles expected during the subsonic phase of the recovery are still not reached after an elapsed time of 10 days and correspondingly there is still a net loss of plasma from the ionosphere to the magnetosphere.
Journal ArticleDOI
Coronal X-ray enhancements associated with H-alpha filament disappearances
TL;DR: The Skylab/ATM experiment as mentioned in this paper provided high-resolution soft X-ray images of the lower corona away from active regions, revealing frequent large-scale transient Xray enhancements which could often be associated with the disappearance of H-alpha filaments.
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