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| Titel |
Interplanetary Shocks observed by STEREO |
| VerfasserIn |
Xochitl Blanco-Cano, Ernesto Aguilar-Rodriguez, Primoz Kajdic, Christopher Russell, Lan Jian, Janet Luhmann |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048952
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| Zusammenfassung |
| STEREO observations during the extended solar minimum have provided a good opportunity
to study interplanetary shocks driven by solar wind stream interactions. These shocks have
low-moderate Mach number (Mms 1.1~2.5) and in most cases are quasi-perpendicular. In the
past years only a few shocks driven by interplanetary coronal mass ejections (ICMEs) were
observed. In general they had small Mach numbers (Mms < 2). As solar activity increases as
part of cycle 24 we expect to observe more shocks driven by ICMEs. For very fast ICMEs,
these shocks can be stronger with higher Mach numbers than stream driven shocks. Solar
wind properties are modified by shocks, and they participate in the acceleration of solar
energetic particles. They are responsible for the generation of extended regions where
low frequency waves are present. The extension and characteristics of the waves
depend strongly on shock geometry and Mach number. In this work we study the
upstream and downstream regions of interplanetary shocks observed by STEREO. We
also study the transition that shock profiles suffer with Mach number, i.e. from
subcritical into supercritical regimes. We also investigate possible differences between
shocks associated with SEP events and shocks where no such events are present. |
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