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| Titel |
STEREO observations of CIR-associated energetic ions |
| VerfasserIn |
Raúl Gómez-Herrero, Olga Malandraki, Nina Dresing, Emilia Kilpua, Bernd Heber, Andreas Klassen, Reinhold Müller-Mellin, Robert F. Wimmer-Schweingruber |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041317
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| Zusammenfassung |
| In absence of solar activity, Co-rotating Interaction Regions (CIRs) are a prevailing source of energetic ions observed near 1 AU. The twin STEREO spacecraft launched in October 2006, together with near-Earth observatories offer an excellent platform for multi-point studies of CIR. Time-shifting and back-mapping techniques allow the comparison of ion increases observed by different spacecraft at different times but associated to the same CIR. The analysis shows that CIR-associated ions frequently show significant differences, particularly at sub-MeV energies. We present several cases where these differences are linked to the presence of Interplanetary Coronal Mass Ejections (ICMEs) or small-scale interplanetary transients in the vicinity or embedded within the CIR. Evidence of the possible role of ICME-CIR interaction as sources of temporal variations in the CIR-associated ion increases are presented and discussed |
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