[Todos] IAFE-COLOQUIO: "Upstream ion cyclotron waves at Venus: observations from Venus Express"]

[difusion en iafe.uba.ar]

                 PRÓXIMO COLOQUIO DEL IAFE
            Instituto de Astronomía y Física del Espacio
                      CONICET-UBA
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"Upstream ion cyclotron waves at Venus: observations from Venus Express"
                            Magda Delva
   Space Research Institute, Austrian Academy of Sciences, Graz, Austria
                   Miércoles 30 de mayo 2012, 15:00hs.
                          Aula del Edificio IAFE


The magnetometer measurements aboard the Venus Express spacecraft revealed
the existence of proton cyclotron waves upstream of the Venus bow shock.
An overview of the detected waves, their properties and place of
occurrence from the first two Venus years of the mission at solar minimum
is presented. The conditions for their occurrence in terms of the motional
solar wind electric field are studied, as well as the conditions for their
generation. Generation is only possible from freshly ionized local
planetary hydrogen, which has implications for the Venus exosphere. New
analyses for Mars now enable a comparison of the waves at both planets.



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