Magnetospheric plasma density inferred from field line resonances: Effects of using different magnetic field models

2014 ◽  
Author(s):  
M. Vellante ◽  
M. Piersanti ◽  
B. Heilig ◽  
J. Reda ◽  
A. Del Corpo
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Plasma Density ◽  
Magnetospheric Plasma ◽  
Field Line Resonances

Discovery of Alfven waves planetward of the Rings of Saturn

2020 ◽  
Author(s):  
David Southwood ◽  
Hao Cao ◽  
Greg Hunt ◽  
Oleg Shebanits ◽  
Michele Dougherty
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Giant Planet ◽  
Effective Field ◽  
Time Varying ◽  
Azimuthal Magnetic Field ◽  
Field Line Resonances ◽  
Background Magnetic Field ◽  
Standing Structure ◽  
Orbiter Mission

<p>Between April and September 2017 in the final stages of the Cassini Saturn Orbiter mission the spacecraft executed 22 orbits passing planetward of the innermost ring, the D-ring.  During periapsis passes on all these orbits oscillations were detected in the azimuthal magnetic field components on typical time scales from a few minutes to 10 minutes. We argue that the time-varying signals detected on the spacecraft are also primarily time-varying in the plasma frame.  Nonetheless, we show that nearly all signals exhibit a distinct spatial effect, namely a magnetic node near the effective field line equator.  The oscillations thus have a standing structure along the background magnetic field and it follows that they are field line resonances associated with Alfvén waves.  The form of the signals suggests that the local field line resonances are most likely pumped from global sources.  This is the first detection in a giant planet magnetosphere of a phenomenon known to be important at Earth.</p>

scholarly journals Field line resonances in a nonaxisymmetric magnetic field

2000 ◽  
Vol 105 (A5) ◽  
pp. 10703-10711 ◽  
Author(s):  
Dong-Hun Lee ◽  
Robert L. Lysak ◽  
Yan Song
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Field Line Resonances

scholarly journals Small-scale, dispersive field line resonances in the hot magnetospheric plasma

1998 ◽  
Vol 103 (A11) ◽  
pp. 26559-26572 ◽  
Author(s):  
A. V. Streltsov ◽  
W. Lotko ◽  
J. R. Johnson ◽  
C. Z. Cheng
Keyword(s):  
Field Line ◽  
Magnetospheric Plasma ◽  
Small Scale ◽  
Field Line Resonances
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