IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Evolution of geoeffective ICMEs in the inner heliosphere (Invited)
Autor/es:
DASSO, S.; DEMOULIN P.; GULISANO A.M.; M.S. NAKWACKI
Reunión:
Conferencia; Fall meeting of the American GeoPhysical Union; 2010
Resumen:
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.