Berlin 2005 – wissenschaftliches Programm

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EP: Extraterrestrische Physik

EP 14: Mars I

EP 14.8: Vortrag

Dienstag, 8. März 2005, 18:45–19:00, TU BH349

Plume-like structure near the Martian wake. ASPERA-MEX observations — •Eduard Dubinin1, M. Fraenz1, J. Woch1, N. Krupp1, R. Lundin2, S. Barabash2, and D. Winnigham31MPS, Katlenburg-Lindau, Germany — 2Swedish Institute of Space Physics, Kiruna, Sweden — 3SRI, San-Antonio, USA

Solar wind induced escape is one of the effective mechanisms responsible for Mars dehydration. Observations made by the ASPERA-3 experiment on the Mars-Express spacecraft have found a localized spatial structure near the wake boundary stretched in the tailward direction and characterized by large fluxes of the magnetosheath-like electrons and planetary ions. The characteristic energy of planetary ions increases with the altitude and varies in the range of 100eV-few keV. The formation of the structure is closely related with the effective penetration of the magnetosheath electrons into the induced magnetosphere near the terminator region. Extraction of planetary ions and their transport to the tail within this structure can be the most important mechanism for ion scavenging.

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