Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23c1634l&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM23C-1634
Physics
Plasma Physics
[5737] Planetary Sciences: Fluid Planets / Magnetospheres, [6275] Planetary Sciences: Solar System Objects / Saturn, [7867] Space Plasma Physics / Wave/Particle Interactions
Scientific paper
Langmuir waves are electrostatic waves generated near the electron plasma frequency by a positive gradient in the electron velocity distribution parallel to the magnetic field. These waves are commonly seen upstream of planetary magnetosheaths in the electron foreshock, where reflection by the bow shock creates the necessary beam of electrons. When the plasma advects through the bow shock, these waves quickly damp out and are generally not observed elsewhere in the magnetosheath. In March 2005, however, the Radio and Plasma Wave Science instrument, on the Cassini spacecraft, observed these waves in the magnetosheath concurrent with Kelvin-Helmholtz-driven motions of the magnetopause. We find that the Langmuir wave occurrence is strongly correlated with the magnetic field orientation. These field orientations of maximum wave activity are similar to the orientation of the magnetopause during the Kelvin-Helmholtz oscillations. We examine the possibility that the Kelvin-Helmholtz waves are perturbing the electron distribution to make the plasma unstable to the growth of Langmuir waves. Such a relationship raises the possibility that Langmuir waves may be used as a remote indicator of the presence of this instability even when the spacecraft is in the magnetosheath but does not encounter the magnetopause.
Arridge Christopher S.
Coates Andrew J.
Dougherty K. M. K. M.
Gurnett Donald A.
Hospodarsky George B.
No associations
LandOfFree
Langmuir Waves Associated with the Kelvin-Helmholtz Instability at Saturn's Magnetopause 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 Langmuir Waves Associated with the Kelvin-Helmholtz Instability at Saturn's Magnetopause, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Langmuir Waves Associated with the Kelvin-Helmholtz Instability at Saturn's Magnetopause will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1878167