HR: 0830h
AN: SM31C-1124    [PDF]
TI: Unusual bow shock crossing events at Jupiter
AU: * Szego, K
EM: szego@rmki.kfki.hu
AF: KFKI Res. Inst. for Particle and Nuclear Physics, 29-33 Konkoly Thege ut, Budapest, H-1525 Hungary
AU: Young, D T
EM: dtyoung@swri.edu
AF: Southwest Research Institute Space Science and Engineering Division, 6220 Culebra Road, San Antonio, TX 78228-0510 United States
AU: Barraclough, B
EM: bbaraclough@lanl.gov
AF: Los Alamos National Laboratory Space and Atmospheric Sciences, SM-30, Bikini Atoll Road, Los Alamos, NM Space Scie
AU: Berthelier, J
EM: jean-jacques.berthelier@cetp.ipsl.fr
AF: Centre d'Etude des Environnements Terrestre et Planetaires, 4 Avenue de Neptune, St. Maur, 94100 France
AU: Bebesi, Z
EM: bzsofi@rmki.kfki.hu
AF: KFKI Res. Inst. for Particle and Nuclear Physics, 29-33 Konkoly Thege ut, Budapest, H-1525 Hungary
AU: Crary, F J
EM: fcrary@swri.edu
AF: Southwest Research Institute Space Science and Engineering Division, 6220 Culebra Road, San Antonio, TX 78228-0510 United States
AU: Erdos, G
EM: erdos@rmki.kfki.hu
AF: KFKI Res. Inst. for Particle and Nuclear Physics, 29-33 Konkoly Thege ut, Budapest, H-1525 Hungary
AU: Dougherty, M
EM: m.dougherty@ic.ac.uk
AF: Space and Atmospheric Physics Imperial College, The Blackett Laboratory, London, SW7 2BZ United Kingdom
AU: Kurth, W
EM: wsk@space.physics.uiowa.edu
AF: The University of Iowa, Dept. of Phys. and Astronomy, Iowa City, IA 52242 United States
AU: Thomsen, M
EM: mthomsen@lanl.gov
AF: Los Alamos National Laboratory Space and Atmospheric Sciences, SM-30, Bikini Atoll Road, Los Alamos, NM Space Scie
AB: The Cassini spacecraft on its way to Saturn explored the plasma environment of Jupiter near the ecliptic plane, on the dusk side of the planet. The first bow shock (BS) crossing took place on 30 December 2000, and it was followed by about 40 more bow shock crossing events in the distant flanks. The CAPS sensor onboard Cassini, dedicated to measure charged particle spectra up to 50 keV, monitored almost continuously these crossings. We classify a few of these as "unusual", because during those crossings the bulk plasma velocity between quiet upstream and quiet downstream conditions reached higher values than upstream in the unperturbed SW. Here we focus on these "unusual" events and we investigate in detail the plasma parameters as a function of time as Cassini crossed the Jovian bow shock. We use the measurements of the ion beam sensor (IBS) of CAPS and the data measured by the magnetometer, and the radio and plasma wave science (RPWS) instrument. One of the possible explanations we put forward here is that we possibly observed the interaction of interplanetary shocks with the bow shock of Jupiter. We summarize what is known in the literature for shock interactions, and we compare the observations with those models.
DE: 2109 Discontinuities
DE: 2139 Interplanetary shocks
DE: 2154 Planetary bow shocks
DE: 7827 Kinetic and MHD theory
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting