 |
| Titel |
Further development in theory/data closure of the photoelectron-driven polar wind and day-night transition of the outflow |
| VerfasserIn |
S. W. Y. Tam, F. Yasseen, T. Chang |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 16, no. 8 ; Nr. 16, no. 8, S.948-968 |
| Datensatznummer |
250013392
|
| Publikation (Nr.) |
 copernicus.org/angeo-16-948-1998.pdf |
|
|
|
|
|
| Zusammenfassung |
| Recent in situ observations have revealed
novel features in the polar wind. Measurements between 5000 and 9000 km altitude
by the Akebono satellite indicate that both H+ and O+ ions
can have remarkably higher outflow velocities in the sunlit region than on the
nightside. Electrons also display an asymmetric behavior: the dayside difference
in energy spread, greater for upward-moving than downward-moving electrons, is
absent on the nightside. Here, we discuss the further development of a theory by
Tam et al. that can explain most of these observed peculiar properties by
properly taking into account the global, kinetic, collisional effects of the
sunlit photoelectrons, on the background polar wind and the electric field.
Quantitative comparisons of the calculated results with actual data will be
described. In addition, transition from the daytime photoelectron-driven polar
wind to the night-time polar wind will be discussed. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|