| タイトル | Comparative study of energetic heliospheric electrons at wind and geotail |
| 著者（英） | Kokubun, S. K.; Bosqued, J.-M.; Lepping, R. P.; Yamamoto, T.; Sanderson, T. R.; Lanzerotti, L. J.; Chaizy, P. A.; Lin, R. P. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1997-12-01 |
| 言語 | eng |
| 内容記述 | The current fleet of both heliospheric and magnetospheric spacecraft provides a unique opportunity of studying spatio-temporal plasma phenomena. Among the numerous topics that can be addressed by such a fleet, figures the 3D study of energetic (greater than 20 keV) solar electron) solar electron events. WIND and GEOTAIL are particulary interesting for such analysis: more than two years of data; up to 3/4 continuous days spent by GEOTAIL in the solar wind; and comparable experiments. During solar electron events, rapid electron flux changes can be associated with these structures. Sometimes they are seen at both spacecraft with a time difference corresponding to the convection time, but sometimes they are observed at one spacecraft but not at the other. Several preliminary conclusions can be drawn from such events: (1) there is direct evidence that, within distances lower than 1.5 x 10(exp 6) km at 1 A (approximately 7000 km at the sun), there are significant spatial variations of (a) the magnetic field line connections to the source region and probably of (b) the particle propagation features; (2) magnetic field lines inside and outside particle propagation structures can keep distinct access to the source region for more than one hour; (3) flux waves, of probable local origin, were observed; and (4) within one hour, spatial flux discrepancies, separated by magnetic structures, may remain or disappear. |
| NASA分類 | Solar Physics |
| 権利 | No Copyright, Distribution within the U.S. granted by agreement |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/540014 |
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