4:25 PM - 4:40 PM
[PEM13-09] Origin of energetic electron precipitation with fast fluctuation: Data-driven simulations using the ERG plasma wave observations
Keywords:Pulsating Aurora, Relativistic electron microbursts, Whistler chorus bursts, Data-driven test-particle simulation, ERG
In this study, we demonstrate electron precipitation caused by realistic whistler chorus waves using our newly developed test-particle model, GEMSIS-RBW-II simulation code. Wave form data obtained from ERG satellite are applied to the simulation model as a boundary condition at the magnetic equator. The simulation shows that the whistler chorus waves propagating to high magnetic latitudes along the field line can precipitate electrons with energy from keV to MeV. We found that amplitude modulation of a whistler chorus burst observed by ERG causes over ten Hz modulation of keV electron precipitation. At relativistic energies fluctuation with higher frequencies and bursty/intermittent nature appear in time history of precipitation flux. It suggests that whistler chorus bursts can cause electron precipitation associated with pulsating aurora and relativistic electron microbursts.