HR: 1340h
AN: SH43A-1142    [Abstracts]
TI: Variations of the Location of the Induced Magnetospheric Boundary at Mars - Mars Express Aspera-3 Observations
AU: Fraenz, M
EM: fraenz@mps.mpg.de
AF: MPI fuer Sonnensystemforschung, Max-Planck_str.2, Katlenburg-Lindau, 37191 Germany
AU: * Roussos, E
EM: roussos@mps.mpg.de
AF: MPI fuer Sonnensystemforschung, Max-Planck_str.2, Katlenburg-Lindau, 37191 Germany
AU: Duninin, E
EM: dubinin@mps.mpg.de
AF: MPI fuer Sonnensystemforschung, Max-Planck_str.2, Katlenburg-Lindau, 37191 Germany
AU: Woch, J
EM: woch@mps.mpg.de
AF: MPI fuer Sonnensystemforschung, Max-Planck_str.2, Katlenburg-Lindau, 37191 Germany
AU: Barabash, S
EM: stas@irf.se
AF: Swedish Institute of Space Physics, Box 812, Kiruna, S-98 128 Sweden
AU: TEAM, A
EM: stas@irf.se
AF: No affiliation, n/a, n/a, n/a Sweden
AB: The location of the induced magnetospheric boundary (IMB) determines the size of the region where planetary ions can be accelerated and where energetic neutral atoms can be produced. We use data of the Mars Express Aspera-3 instrument to determine the stand-off distance of the MPB dependent on the Mars crustal magnetic fields (determined from Mars Global Surveyor data) and solar zenith angle. One important result is the linear dependence of the IMB altitude on the crustal field strength at 400km altitude. We further investigate the penetration depth of ions which overcome the boundary. We discuss the importance of these observations for the escape of planetary ions and neutral atoms.
DE: 6025 Interactions with solar wind plasma and fields
DE: 6225 Mars
SC: SPA-Solar and Heliospheric Physics [SH]
MN: Fall Meeting 2005