scholarly journals Magnetic Flux Braiding: Force‐free Equilibria and Current Sheets

1998 ◽  
Vol 500 (1) ◽  
pp. 471-482 ◽  
Author(s):  
A. W. Longbottom ◽  
G. J. Rickard ◽  
I. J. D. Craig ◽  
A. D. Sneyd
Keyword(s):  
Magnetic Flux ◽  
Current Sheets

APPLICATION OF THE MAGNETIC FLUX PLASMA TRAP TO GENERATION OF CURRENT SHEETS IN A RAREFIED PLASMA

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-507-C7-510
Author(s):  
N. A. Koshilev ◽  
N. A. Strokin ◽  
A. A. Shisko ◽  
A. V. Mikhalev
Keyword(s):  
Magnetic Flux ◽  
Current Sheets ◽  
Plasma Trap

Magnetic Flux Emergence into the Solar Corona. II. Global Magnetic Fields with Current Sheets

2002 ◽  
Vol 576 (2) ◽  
pp. 1005-1017 ◽  
Author(s):  
M. Zhang ◽  
B. C. Low
Keyword(s):  
Magnetic Fields ◽  
Magnetic Flux ◽  
Solar Corona ◽  
Flux Emergence ◽  
Current Sheets

Instability of current sheets with a localized accumulation of magnetic flux

2015 ◽  
Vol 22 (6) ◽  
pp. 062102 ◽  
Author(s):  
P. L. Pritchett
Keyword(s):  
Magnetic Flux ◽  
Current Sheets

scholarly journals A Three-dimensional Study of Reconnection, Current Sheets, and Jets Resulting from Magnetic Flux Emergence in the Sun

2004 ◽  
Vol 618 (2) ◽  
pp. L153-L156 ◽  
Author(s):  
K. Galsgaard ◽  
F. Moreno-Insertis ◽  
V. Archontis ◽  
A. Hood
Keyword(s):  
Magnetic Flux ◽  
Three Dimensional ◽  
The Sun ◽  
Flux Emergence ◽  
Current Sheets

On the origins of magnetic flux ropes in near-Mars magnetotail current sheets

2017 ◽  
Vol 44 (15) ◽  
pp. 7653-7662 ◽  
Author(s):  
Takuya Hara ◽  
Yuki Harada ◽  
David L. Mitchell ◽  
Gina A. DiBraccio ◽  
Jared R. Espley ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Current Sheets ◽  
Magnetic Flux Ropes ◽  
Flux Ropes

scholarly journals Vortex flow properties in simulations of solar plage region: Evidence for their role in chromospheric heating

2020 ◽  
Vol 645 ◽  
pp. A3
Author(s):  
N. Yadav ◽  
R. H. Cameron ◽  
S. K. Solanki
Keyword(s):  
Magnetic Flux ◽  
Physical Properties ◽  
Numerical Simulations ◽  
Solar Atmosphere ◽  
Small Scale ◽  
Flux Tubes ◽  
Current Sheets ◽  
Plage Region ◽  
Magnetic Flux Tubes ◽  
Chromospheric Heating

Context. Vortex flows exist across a broad range of spatial and temporal scales in the solar atmosphere. Small-scale vortices are thought to play an important role in energy transport in the solar atmosphere. However, their physical properties remain poorly understood due to the limited spatial resolution of the observations. Aims. We explore and analyze the physical properties of small-scale vortices inside magnetic flux tubes using numerical simulations, and investigate whether they contribute to heating the chromosphere in a plage region. Methods. Using the three-dimensional radiative magnetohydrodynamic simulation code MURaM, we perform numerical simulations of a unipolar solar plage region. To detect and isolate vortices we use the swirling strength criterion and select the locations where the fluid is rotating with an angular velocity greater than a certain threshold. We concentrate on small-scale vortices as they are the strongest and carry most of the energy. We explore the spatial profiles of physical quantities such as density and horizontal velocity inside these vortices. Moreover, to learn their general characteristics, a statistical investigation is performed. Results. Magnetic flux tubes have a complex filamentary substructure harboring an abundance of small-scale vortices. At the interfaces between vortices strong current sheets are formed that may dissipate and heat the solar chromosphere. Statistically, vortices have higher densities and higher temperatures than the average values at the same geometrical height in the chromosphere. Conclusions. We conclude that small-scale vortices are ubiquitous in solar plage regions; they are denser and hotter structures that contribute to chromospheric heating, possibly by dissipation of the current sheets formed at their interfaces.

Generalized magnetotail equilibria: Effects of the dipole field, thin current sheets, and magnetic flux accumulation

2016 ◽  
Vol 121 (8) ◽  
pp. 7664-7683 ◽  
Author(s):  
M. I. Sitnov ◽  
V. G. Merkin
Keyword(s):  
Magnetic Flux ◽  
Dipole Field ◽  
Current Sheets

Possible Amount of Magnetic Flux Reconnected Through Quiescent Prominences Outside the Active Regions

1979 ◽  
Vol 44 ◽  
pp. 189-191
Author(s):  
M.H. Gokhale ◽  
K.R. Sivaraman
Keyword(s):  
Magnetic Fields ◽  
Magnetic Flux ◽  
Working Group ◽  
Large Scale ◽  
Active Regions ◽  
Current Sheets ◽  
Satisfactory Model ◽  
Almost All ◽  
Group 1

Quiescent prominences are known to occur invariably above the neutral lines in the large scale photospheric fields. This suggests that such prominences may be coronal current sheets across which the magnetic fields reconnect (cf. e.g. Raadu and Kuperus, 1973). In the absence of any satisfactory model for quiescent prominences (cf. Report of Working Group 1 in this Colloquium), the reconnection hypothesis remains as yet unsettled. However, if it is true, we have here an evidence to show that the quiescent prominences outside the active regions might account for the reconnection of almost all the photospheric magnetic flux emerging in the active regions as required by the theories of the 11-yr cycle of activity (e.g. Babcock, 1961).

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
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