Title :
Dust-magnetosonic modes in planetary rings
Author :
Verheest, Frank ; Hellberg, Manfred A.
Author_Institution :
Sterrenkundig Obs., Gent Univ., Belgium
fDate :
4/1/2001 12:00:00 AM
Abstract :
Dust particles on near-Keplerian orbits in planetary rings drift relative to the co-rotating background plasma. Such relative streaming may drive dust-magnetosonic instabilities. Using a magnetofluid model, we revisit this situation, and include the possibility of polydisperse dust. In particular, we show that the growth rate is lower than anticipated from earlier work and that the instabilities cannot occur close to synchronous distance from the planet
Keywords :
dusty plasmas; planetary rings; plasma instability; co-rotating background plasma; dust-magnetosonic instabilities; dust-magnetosonic modes; instabilities; magnetofluid model; near-Keplerian orbits; planetary rings; polydisperse dust; synchronous distance; Dusty plasma; Electrons; Frequency; Kinetic theory; Magnetosphere; Orbits; Planets; Plasma properties; Plasma waves; Space technology;
Journal_Title :
Plasma Science, IEEE Transactions on
