The thermal and plasma-physical evolution of laminar current sheets formed in the solar atmosphere by emerging flux

1992 ◽  
Vol 396 ◽  
pp. 289 ◽  
Author(s):  
T. N. Larosa
Keyword(s):  
Solar Atmosphere ◽  
Current Sheets ◽  
Laminar Current

The formation of current sheets in the solar atmosphere

1987 ◽  
Vol 312 ◽  
pp. 423 ◽  
Author(s):  
Ellen G. Zweibel ◽  
He-Sheng Li
Keyword(s):  
Solar Atmosphere ◽  
Current Sheets

Current sheets in the solar atmosphere

1997 ◽  
Vol 20 (12) ◽  
pp. 2309-2312 ◽  
Author(s):  
A.I. Podgorny ◽  
I.M. Podgorny
Keyword(s):  
Solar Atmosphere ◽  
Current Sheets

scholarly journals Particle dynamics in 3-D reconnecting current sheets in the solar atmosphere

2005 ◽  
Vol 443 (2) ◽  
pp. 663-678 ◽  
Author(s):  
C. Efthymiopoulos ◽  
C. Gontikakis ◽  
A. Anastasiadis
Keyword(s):  
Solar Atmosphere ◽  
Particle Dynamics ◽  
Current Sheets

scholarly journals On the Possibility of Radio Observations of Current Sheets on the Sun

1980 ◽  
Vol 86 ◽  
pp. 445-455
Author(s):  
S.I. Syrovatskii ◽  
V.D. Kuznetsov
Keyword(s):  
Electron Density ◽  
Optical Depth ◽  
Solar Atmosphere ◽  
Critical Frequency ◽  
Angular Resolution ◽  
The Sun ◽  
Radio Observations ◽  
Current Sheets ◽  
Large Intensity ◽  
Temperature Electron

Possibility of a discovery of current sheets in the radioband by using their screening and reflective properties as also their own emission is discussed. It is shown, that the thermal bremsstrahlung of the sheet may be of a sufficiently large intensity on the maximal critical frequency for the plasma in the sheet. In dependence from electron density No and temperature Ts the thickness of the sheet from tens centimetres to hundreds metres is sufficient to provide optical depth Spectral observations with sufficient angular resolution may give such characteristics of the sheet as its temperature, electron density, thickness and height in the solar atmosphere.

The structure and dissipation of forced current sheets in the solar atmosphere

1987 ◽  
Vol 317 ◽  
pp. 900 ◽  
Author(s):  
Tzihong Chiueh ◽  
Ellen G. Zweibel
Keyword(s):  
Solar Atmosphere ◽  
Current Sheets

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.

scholarly journals HEATING MECHANISMS IN THE LOW SOLAR ATMOSPHERE THROUGH MAGNETIC RECONNECTION IN CURRENT SHEETS

2016 ◽  
Vol 832 (2) ◽  
pp. 195 ◽  
Author(s):  
Lei Ni ◽  
Jun Lin ◽  
Ilia I. Roussev ◽  
Brigitte Schmieder
Keyword(s):  
Magnetic Reconnection ◽  
Solar Atmosphere ◽  
Current Sheets
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