Spontaneous formation of electric current sheets and the origin of solar flares

1988 ◽  
Vol 324 ◽  
pp. 574 ◽  
Author(s):  
B. C. Low ◽  
R. Wolfson
Keyword(s):  
Electric Current ◽  
Solar Flares ◽  
Current Sheets ◽  
Spontaneous Formation

Spontaneous formation of electric current sheets by the expulsion of magnetic flux

1989 ◽  
Vol 340 ◽  
pp. 558 ◽  
Author(s):  
B. C. Low
Keyword(s):  
Magnetic Flux ◽  
Electric Current ◽  
Current Sheets ◽  
Spontaneous Formation

NUMERICAL EXPERIMENTS ON FINE STRUCTURE WITHIN RECONNECTING CURRENT SHEETS IN SOLAR FLARES

2011 ◽  
Vol 737 (1) ◽  
pp. 14 ◽  
Author(s):  
Chengcai Shen ◽  
Jun Lin ◽  
Nicholas A. Murphy
Keyword(s):  
Fine Structure ◽  
Solar Flares ◽  
Numerical Experiments ◽  
Current Sheets

scholarly journals PARTICLE ACCELERATION IN FRAGMENTING PERIODIC RECONNECTING CURRENT SHEETS IN SOLAR FLARES

2010 ◽  
Vol 720 (2) ◽  
pp. 1603-1611 ◽  
Author(s):  
M. Gordovskyy ◽  
P. K. Browning ◽  
G. E. Vekstein
Keyword(s):  
Particle Acceleration ◽  
Solar Flares ◽  
Current Sheets

The energy of electric current sheets

Solar Physics ◽  
1982 ◽  
Vol 81 (1) ◽  
pp. 107-119 ◽  
Author(s):  
Y. Q. Hu ◽  
B. C. Low
Keyword(s):  
Electric Current ◽  
Current Sheets

Generation of acoustic waves by harmonic electric current sheets in the sea

1981 ◽  
Vol 69 (4) ◽  
pp. 970-973
Author(s):  
K. J. Harker ◽  
A. C. Fraser–Smith
Keyword(s):  
Electric Current ◽  
Acoustic Waves ◽  
Current Sheets

scholarly journals Four Subjects in Solar Physics from the Point of View of the Electric Current Approach

2020 ◽  
pp. 33-45
Author(s):  
Syun-Ichi Akasofu
Keyword(s):  
Solar Wind ◽  
Electric Current ◽  
Solar Flares ◽  
Solar Physics ◽  
Current Approach ◽  
Point Of View ◽  
Coronal Temperature ◽  
The Past ◽  
Electromagnetic Processes ◽  
Difficult Subjects

Four major subjects in solar physics, the heating of the corona, the cause of the solar wind, the formation of sunspots and the cause of solar flares, are discussed on the basis of the electric current approach, a sequence of processes consisting of power supply(dynamo), transmission (currents/circuits) and dissipation(high coronal temperature, solar wind, sunspots and solar flares).This is because the four subjects have hardly been considered in terms of the electric current approach in the past, in spite of the fact that these subjects are various manifestations of electromagnetic processes. It is shown that this approach provides a new systematic way of considering each subject; (1) the long-standing issue of the coronal temperature, (2)the long-standing problem on the cause of the solar wind, (3)the presence of single spots(forgotten or dismissed in the past) and its relation to unipolar magnetic regions and (4) the crucial power/energy source and subsequent explosive processes of solar flares. The four subjects are obviously extremely complicated and difficult subjects, but it is hoped that the electric current approach might provide a new insight in considering the four subjects.

scholarly journals Sources of solar energetic particles

2019 ◽  
Vol 377 (2148) ◽  
pp. 20180095 ◽  
Author(s):  
Loukas Vlahos ◽  
Anastasios Anastasiadis ◽  
Athanasios Papaioannou ◽  
Athanasios Kouloumvakos ◽  
Heinz Isliker
Keyword(s):  
Solar Corona ◽  
Space Weather ◽  
Solar Flares ◽  
Large Scale ◽  
Energetic Particles ◽  
Solar Energetic Particles ◽  
Plasma Parameters ◽  
Current Sheets ◽  
Solar Eruptions ◽  
Magnetohydrodynamic Simulations

Solar energetic particles are an integral part of the physical processes related with space weather. We present a review for the acceleration mechanisms related to the explosive phenomena (flares and/or coronal mass ejections, CMEs) inside the solar corona. For more than 40 years, the main two-dimensional cartoon representing our understanding of the explosive phenomena inside the solar corona remained almost unchanged. The acceleration mechanisms related to solar flares and CMEs also remained unchanged and were part of the same cartoon. In this review, we revise the standard cartoon and present evidence from recent global magnetohydrodynamic simulations that support the argument that explosive phenomena will lead to the spontaneous formation of current sheets in different parts of the erupting magnetic structure. The evolution of the large-scale current sheets and their fragmentation will lead to strong turbulence and turbulent reconnection during solar flares and turbulent shocks. In other words, the acceleration mechanism in flares and CME-driven shocks may be the same, and their difference will be the overall magnetic topology, the ambient plasma parameters, and the duration of the unstable driver. This article is part of the theme issue ‘Solar eruptions and their space weather impact’.

scholarly journals Solar and Stellar Magnetic Fields and Atmospheric Structures: Theory

1989 ◽  
Vol 104 (1) ◽  
pp. 271-288
Author(s):  
E. N. Parker
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Dynamical Behavior ◽  
Convective Zone ◽  
Coronal Heating ◽  
The Sun ◽  
Current Sheets ◽  
Spontaneous Formation ◽  
Stellar Magnetic Fields ◽  
The Magnetic Field

AbstractThis presentation reviews selected ideas on the origin of the magnetic field of the Sun, the dynamical behavior of the azimuthal field in the convective zone, the fibril state of the field at the photosphere, the formation of sunspots, prominences, the spontaneous formation of current sheets in the bipolar field above the surface of the Sun, coronal heating, and flares.

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