昼側シース領域におけるPc3波動の特性

概要

論文の詳細を見る
Wave characteristics (wave modes and Poynting fluxes) of hydromagnetic ULF signals, Pc 3 (periods=lO-40 sec) in the magnetosheath were investigated using the magnetic field, electric field and plasmas simultaneously measured by the Japanese scientific satellite, GEOTAIL. The results showed that Pc 3 ULF signals in the magnetosheath propagated with the mixed wave modes including fast, intermediate and slow magnetosonic waves. The Poynting fluxes of the Pc 3 ULF signals in the magnetosheath were found to be 100-1000 times bigger than those of the Pc 3 signals observed in the magnetosphere (10-50 nJ/m^2s), suggesting that the transmission efficiency of Pc 3 signals across the magnetopause is the order of l% or 0.l% only. These observed facts suggest that Pc 3 ULF waves in the magnetosheath should be the sufficient energy source for the PC 3 observed both in the magnetosphere and on the ground.
東海大学の論文