Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm21a1666s&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM21A-1666
Physics
2730 Magnetosphere: Inner, 2774 Radiation Belts
Scientific paper
Some observations have shown high energy electron flux decreases after an enhancement of solar wind dynamic pressure. The events have been observed even in non-magnetic storm time. In this study, a loss mechanism of relativistic electrons in the outer radiation belt during non-magnetic storm time is studied by test-particle simulation using the 2D guiding center equations on the equatorial plane. The empirical magnetic field, which is calculated from the Tsyganenko model TS05, is applied to the simulations by using the solar wind data obtained from a spacecraft. In the simulations, the inductive electric field caused by solar wind dynamic pressure variation is applied, following Ukhorskiy et al. (2006). We compare the simulated flux variation with the GOES observed MeV electrons, and discuss the effect of the solar wind dynamic pressure variation on the loss of relativistic electrons at geostationary orbit.
Miyoshi Yasunobu
Saito Shuji
Seki Kazuhiko
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