Computer Science
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.293..384t&link_type=abstract
Nature, vol. 293, Oct. 1, 1981, p. 384-386.
Computer Science
35
Electromagnetic Radiation, Magnetosheath, Magnetospheric Instability, Plasma Diagnostics, Wave Generation, Whistlers, International Sun Earth Explorer 1, Magnetic Signatures, Plasma Density, Plasma Pressure, Temporal Distribution, Time Response
Scientific paper
The origin of lion roars, intense electromagnetic whistler-mode waves which occur throughout the magnetosheath, is investigated based on particle and field data obtained on the ISEE satellites. Analysis of the measured magnetic fields, plasma densities and plasma wave intensities during periods of lion roar emission reveals the lion roar bursts to be correlated with decreases in magnetic field intensity, while the plasma density exhibits a strong anticorrelation with the magnetic field variability during the bursts and the total plasma pressure remains essentially constant. Results indicate that the waves can originate by the cyclotron resonant instability with anisotropic magnetosheath electrons whenever the magnetic energy per particle falls to values comparable with the electron thermal energy. Variations in the magnetic energy appear to be associated with the hydromagnetic mirror instability which in turn is excited by a pressure anisotropy in the magnetosheath ion population.
Mansergh Thorne Richard
Tsurutani Bruce T.
No associations
LandOfFree
The generation mechanism for magnetosheath lion roars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The generation mechanism for magnetosheath lion roars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The generation mechanism for magnetosheath lion roars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1470244