HR: 1340h
AN: SM13C-1463    [Abstracts]
TI: Relationship of density in the tail lobe to the solar wind
AU: * Sumita, S
EM: sumita.s.aa@m.titech.ac.jp
AF: Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
AU: Nagai, T
EM: nagai.t.ac@m.titech.ac.jp
AF: Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
AB: Geotail observes electron density in the magnetotail lobes. We investigate relationship between the lobe density and the solar wind parameters. Lobe plasma density is higher, when the interplanetary magnetic field (IMF) is stronger, solar wind speed is lower, and solar wind density is higher. In the north tail lobe, field-aligned bidirectional fluxes are observed when the IMF has a –Bx component (away sector). In the south lobe, they are observed when the IMF has a +Bx component (toward sector). When these bidirectional fluxes are observed, Kp is larger. These IMF-controlled asymmetries are consistent with earlier observations.
DE: 2744 Magnetotail
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting