Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh43c..05d&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SH43C-05
Physics
[2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds
Scientific paper
Over recent years, the new generation of space observations using multispacecraft fleets combined with high performance MHD numerical simulations and with new theoretical interpretations, have led to a very fruitful advance on our knowledge about the evolution of geoeffective transient structures of solar origin, from their birth in the low corona to their arrival at Earth. Interplanetary Coronal Mass Ejections (ICMEs) are the most geoeffective transients in the solar wind (SW), and the comparison between models and observations is one of the keys to clarify their dynamical evolution, mainly given by interaction with the environment. In this presentation we will examine some important physical processes, which can take place during the interaction ICME-SW and ICME-ICME, as drag, deviation from radial propagation, distortion of their inner configuration, and compression or expansion with the consequent intensification or weakening of the internal magnetic field. All these processes are crucial to determine the geoeffectiveness of an ICME reaching Earth.
Dasso Sergio
Démoulin Pascal
Gulisano Adriana Maria
Nakwacki M.
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