HR: 1400h
AN: SM33B-06    [Abstracts]
TI: High-latitude Bow Shock: Tilt Angle Effects
AU: * Jelinek, K
EM: karel.jelinek@gmail.com
AF: Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, Prague, 180 00, Czech Republic
AU: Safrankova, J
EM: jana.safrankova@mff.cuni.cz
AF: Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, Prague, 180 00, Czech Republic
AU: Nemecek, Z
EM: zdenek.nemecek@mff.cuni.cz
AF: Charles University, Faculty of Mathematics and Physics, V Holesovickach 2, Prague, 180 00, Czech Republic
AB: The bow shock is created in front of an obstacle immersed into a supersonic flow and its location depends on the size and shape of the obstacle. It was found that the obstacle (magnetopause) is scaled with the solar wind dynamic pressure and changes its dimensions and location with dipole tilt angle and interplanetary magnetic field (IMF) orientation. The similar functional dependences would be used for prediction of the bow shock position. Many bow shock models have been developed for various conditions in course of years; however, none of these models consider the parametrization of bow shock properties with the tilt angle. The present study employs a set of about 3000 bow shock crossings registered during 1994-2002 by the different spacecraft (INTERBALL-1, IMP-8, GEOTAIL, MAGION-4, and CLUSTER-2) and presents an investigation of the tilt angle influence on the bow shock location. The study is based on a comparison of recent bow shock models with experimental data and with global MHD models.
DE: 2139 Interplanetary shocks
DE: 2154 Planetary bow shocks
DE: 2728 Magnetosheath
DE: 2752 MHD waves and instabilities (2149, 6050, 7836)
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Joint Assembly