HR: 1340h
AN: SM23A-0480    [Abstracts]
TI: Freja Observations of EM-waves Localized in Density Depletions
AU: * Reiniusson, A
EM: annie.reiniusson@space.umu.se
AF: Umea University, Department of Physics Umea University, Umea, SE-90187 Sweden
AU: Stenberg, G
EM: stenberg@space.umu.se
AF: Umea University, Department of Physics Umea University, Umea, SE-90187 Sweden
AU: Norqvist, P
EM: norqvist@space.umu.se
AF: Umea University, Department of Physics Umea University, Umea, SE-90187 Sweden
AU: Eriksson, A I
EM: aie@irfu.se
AF: Swedish Institute of Space Physics, Box 537, Uppsala, SE-751 21 Sweden
AB: Waves with frequencies around the lower hybrid frequency localized in density cavities, so called LHC:s, has been observed in space for more than ten years. These waves are generally purely electrostatic, with no detectable enhancement in magnetic wave activity. We have found waves on the gradient of density depletions that seems to be electromagnetic. These EM-waves and the shape of the cavities we observe are similar to observations made in laboratories. We make case studies as well as a small statistical study to investigate these waves, and verify that they are electromagnetic.
DE: 2483 Wave/particle interactions
DE: 2712 Electric fields (2411)
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting