 |
| Titel |
Statistical study of foreshock processes observed by THEMIS |
| VerfasserIn |
Jaroslav Urbar, Zdenek Nemecek, Jana Safrankova, Lubomir Prech |
| Konferenz |
EGU General Assembly 2016
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250131906
|
| Publikation (Nr.) |
 EGU/EGU2016-12359.pdf |
|
|
|
|
|
| Zusammenfassung |
| The parameters of the solar wind plasma are modified upstream the Earth´ s bow shock, in
the ion foreshock region, which is typically observed at quasi-parallel bow shocks and is
characterized by an enhanced level of ULF waves. These waves are created due to an
interaction of the solar wind with the ions reflected at the bow shock. Consequently, fast
magnetosonic waves are generated with an in–phase relationship between the ion flux and
magnetic field fluctuations. Using multipoint observations of the THEMIS spacecraft located
in the vicinity of the bow shock or in the foreshock, we present statistical maps of a
modification of solar wind parameters due to foreshock processes (solar wind heating and
deceleration, enhancements of the electric and magnetic field fluctuation level, etc.). A
special attention was devoted to intervals of the radial interplanetary magnetic field
orientation that would have create the foreshock upstream of the whole dayside bow shock. |
|
|
|
|
|
|