scholarly journals Discovery of Alfvén waves planetward of Saturn’s rings

2020 ◽  
Author(s):  
D. J. Southwood ◽  
H. Cao ◽  
O. Shebanits ◽  
T. Elsden ◽  
G. J. Hunt ◽  
...  
Keyword(s):  
Alfven Waves ◽  
Alfvén Waves ◽  
Saturn’S Rings ◽  
Saturn's Rings

Comments on collision mechanics in ring systems

1984 ◽  
Vol 75 ◽  
pp. 407-422
Author(s):  
William K. Hartmann
Keyword(s):  
Asteroid Belt ◽  
Surface Erosion ◽  
Surface Layers ◽  
Ring Systems ◽  
Eclipse Observations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTThe nature of collisions within ring systems is reviewed with emphasis on Saturn's rings. The particles may have coherent icy cores and less coherent granular or frosty surface layers, consistent with thermal eclipse observations. Present-day collisions of such ring particles do not cause catastrophic fragmentation of the particles, although some minor surface erosion and reaccretion is possible. Evolution by collisional fragmentation is thus not as important as in the asteroid belt.

Voyager UVS observations of stellar occultations by the rings of Saturn

1984 ◽  
Vol 75 ◽  
pp. 265-277
Author(s):  
J.B. Holbelg ◽  
W.T. Forrester
Keyword(s):  
Optical Depth ◽  
Distance Scale ◽  
Density Waves ◽  
Ring Density ◽  
Stellar Occultations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTDuring the Voyager 1 and 2 Saturn encounters the ultraviolet spectrometers observed three separate stellar occultations by Saturn's rings. Together these three observations, which sampled the optical depth of the rings at resolutions from 3 to 6 km. can be used to establish a highly accurate distance scale allowing the identification of numerous ring features associated with resonances due to exterior satellites. Three separate observations of an eccentric ringlet near the location of the Titan apsidal resonance are discussed along with other ringlet-resonance associations occurring in the C ring. Density waves occurring in the A and B rings are reviewed and a detailed discussion of the analysis of one of these features is presented.

scholarly journals On the origin of solar wind. Alfvén waves induced jump of coronal temperature

2007 ◽  
Vol 44 (3) ◽  
pp. 533-536 ◽  
Author(s):  
T. M. Mishonov ◽  
M. V. Stoev ◽  
Y. G. Maneva
Keyword(s):  
Solar Wind ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Coronal Temperature

AMPTE/CCE observations of substorm-associated standing Alfvén waves in the midnight sector

1988 ◽  
Vol 15 (11) ◽  
pp. 1287-1290 ◽  
Author(s):  
K. Takahashi ◽  
S. Kokubun ◽  
T. Sakurai ◽  
R. W. McEntire ◽  
T. A. Potemra ◽  
...  
Keyword(s):  
Alfven Waves ◽  
Alfvén Waves

Dynamics of nonlinear Alfvén waves in the shallow water magnetohydrodynamic equations

2019 ◽  
Vol 4 (5) ◽  
Author(s):  
Martin Magill ◽  
Aaron Coutino ◽  
Benjamin A. Storer ◽  
Marek Stastna ◽  
Francis J. Poulin
Keyword(s):  
Shallow Water ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Magnetohydrodynamic Equations

scholarly journals Reacceleration of Relativistic Electrons by Turbulent Alfvén Waves in Radio Jets

2000 ◽  
Vol 195 ◽  
pp. 439-441
Author(s):  
D.-Y. Wang ◽  
Y. Ma
Keyword(s):  
Electron Energy ◽  
Power Law ◽  
Diffusion Approximation ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Relativistic Electrons ◽  
Radio Jets

Relativistic electrons may be effectively accelerated by turbulent Alfvén waves in radio jets. The acceleration spectrum is a power law with the electron energy as high as γ ~ 106, but the spectrum index is ~ 1.2 in the condition of diffusion approximation, which is less than the observation value.

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