Coronal Loop Oscillations and Waves

2019 ◽  
pp. 383-421
Author(s):  
Markus J. Aschwanden
Keyword(s):  
Coronal Loop ◽  
Oscillations And Waves

scholarly journals Solar Magnetic Loops Observed with TRACE and EIT

2004 ◽  
Vol 219 ◽  
pp. 503-516
Author(s):  
Markus J. Aschwanden ◽  
Alan M. Title
Keyword(s):  
Transition Region ◽  
Energy Budget ◽  
Coronal Loop ◽  
Extreme Ultraviolet ◽  
Magnetic Energy ◽  
Coronal Loops ◽  
Uniform Heating ◽  
Magnetic Topology ◽  
Oscillations And Waves

We select some highlights and new results that have been obtained from detailed “microscopic” observations of coronal loop structures with the Transition Region and Coronal Explorer (TRACE) and Extreme Ultraviolet Imager (EIT) instruments, including: (1) the inhomogeneous substructure of EUV loops, (2) the dynamic and non-hydrostatic nature, (3) the non-uniform heating, (4) the magnetic topology at the loop foot-points, (5) the magnetic energy budget for heating, and (6) oscillations and waves in coronal loops.

Estimate of plasma parameters in a coronal loop by means of a fiber burst

Solar Physics ◽  
1987 ◽  
Vol 108 (1) ◽  
pp. 131-137 ◽  
Author(s):  
H. Aurass ◽  
J. Kurths ◽  
G. Mann ◽  
G. P. Chernov ◽  
M. Karlick�
Keyword(s):  
Coronal Loop ◽  
Plasma Parameters

On Extensional Oscillations and Waves in Elastic Rods

1998 ◽  
Vol 3 (3) ◽  
pp. 277-295 ◽  
Author(s):  
Shankar Krishnaswamy ◽  
R. C. Batra
Keyword(s):  
Elastic Rods ◽  
Oscillations And Waves

scholarly journals Observational aspects of prominence oscillations

2007 ◽  
Vol 3 (S247) ◽  
pp. 152-157 ◽  
Author(s):  
Oddbjørn Engvold
Keyword(s):  
Magnetic Structure ◽  
Numerical Models ◽  
Small Scale ◽  
Solar Prominences ◽  
Scale Structures ◽  
Oscillations And Waves ◽  
Available Information ◽  
Small Scale Structures

AbstractSeismology has become a powerful tool in studies of the magnetic structure of solar prominences and filaments. Reversely, analytical and numerical models are guided by available information about the spatial and thermodynamical structure of these enigmatic structures. The present invited paper reviews recent observational results on oscillations and waves as well as details about small-scale structures and dynamics of prominences and filaments.

scholarly journals Decayless Kink Oscillations Excited by Random Driving: Motion in Transitional Layer

Solar Physics ◽  
2021 ◽  
Vol 296 (8) ◽  
Author(s):  
M. S. Ruderman ◽  
N. S. Petrukhin ◽  
E. Pelinovsky
Keyword(s):  
Coronal Loop ◽  
Radial Displacement ◽  
Oscillation Amplitude ◽  
Radial Distance ◽  
Magnetic Pressure ◽  
Pressure Perturbation ◽  
Transitional Layer ◽  
Thin Boundary Layer ◽  
Plasma Displacement ◽  
Thin Tube

AbstractIn this article we study the plasma motion in the transitional layer of a coronal loop randomly driven at one of its footpoints in the thin-tube and thin-boundary-layer (TTTB) approximation. We introduce the average of the square of a random function with respect to time. This average can be considered as the square of the oscillation amplitude of this quantity. Then we calculate the oscillation amplitudes of the radial and azimuthal plasma displacement as well as the perturbation of the magnetic pressure. We find that the amplitudes of the plasma radial displacement and the magnetic-pressure perturbation do not change across the transitional layer. The amplitude of the plasma radial displacement is of the same order as the driver amplitude. The amplitude of the magnetic-pressure perturbation is of the order of the driver amplitude times the ratio of the loop radius to the loop length squared. The amplitude of the plasma azimuthal displacement is of the order of the driver amplitude times $\text{Re}^{1/6}$ Re 1 / 6 , where Re is the Reynolds number. It has a peak at the position in the transitional layer where the local Alfvén frequency coincides with the fundamental frequency of the loop kink oscillation. The ratio of the amplitude near this position and far from it is of the order of $\ell$ ℓ , where $\ell$ ℓ is the ratio of thickness of the transitional layer to the loop radius. We calculate the dependence of the plasma azimuthal displacement on the radial distance in the transitional layer in a particular case where the density profile in this layer is linear.

scholarly journals Birth and evolution of a dense coronal loop in a complex flare region

2006 ◽  
Vol 466 (1) ◽  
pp. 339-346 ◽  
Author(s):  
L. Bone ◽  
J. C. Brown ◽  
L. Fletcher ◽  
A. Veronig ◽  
S. White
Keyword(s):  
Coronal Loop ◽  
Flare Region
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