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| Titel |
Observation of shocks associated with CMEs in 2007 |
| VerfasserIn |
H. Aryan, M. A. Balikhin, A. Taktakishvili, T. L. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 32, no. 3 ; Nr. 32, no. 3 (2014-03-12), S.223-230 |
| Datensatznummer |
250121035
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| Publikation (Nr.) |
 copernicus.org/angeo-32-223-2014.pdf |
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| Zusammenfassung |
| The interaction of CMEs with the solar wind can lead to the formation of
interplanetary shocks. Ions accelerated at these shocks contribute to the
solar energetic protons observed in the vicinity of the Earth. Recently a
joint analysis of Venus Express (VEX) and STEREO data by Russell et
al. (2009) have shown that the formation of strong shocks associated with
Co-rotating Interaction Regions (CIRs) takes place between the orbits of
Venus and the Earth as a result of coalescence of weaker shocks formed
earlier. The present study uses VEX and Advanced Composition Explorer (ACE)
data in order to analyse shocks associated with CMEs that erupted on 29 and
30 July 2007 during the solar wind conjunction period between Venus and the
Earth. For these particular cases it is shown that the above scenario of
shock formation proposed for CIRs also takes place for CMEs. Contradiction
with shock formation resulting from MHD modelling is explained by inability
of classical MHD to account for the role of wave dispersion in the formation
of the shock. |
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