Search Publications
Electron dynamics and cross-shock potential at the quasi-perpendicular Earth's bow shock
Lefebvre, Bertrand; Schwartz, Steven J.; Fazakerley, Andrew F. +1 more
The evolution of the electron distribution function through quasi-perpendicular collisionless shocks is believed to be dominated by the electron dynamics in the large-scale coherent and quasi-stationary magnetic and electric fields. We investigate the electron distributions measured on board Cluster by the Plasma Electron and Current Experiment (P…
Polar wind outflow model: Saturn results
Gombosi, T. I.; Toth, G.; Ridley, A. J. +3 more
The Saturnian system's configuration and dynamics are to a large extent controlled by the planet's rapid rotation and the plasma in the magnetosphere. Therefore characterizing the relative importance of the various plasma sources is crucial to understanding Saturn's magnetosphere. Most research in this area focuses on the addition of mass from the…
Cluster observations in the inner magnetosphere during the 18 April 2002 sawtooth event: Dipolarization and injection at r = 4.6 RE
Lucek, E. A.; Frey, H. U.; Lui, A. T. Y. +9 more
The present study examines a sawtooth injection event that took place around 0800 UT on 18 April 2002 when the Cluster spacecraft were located in the inner magnetosphere in the premidnight sector. In association with this injection, Cluster, at a radial distance of 4.6 R E , observed that the local magnetic field became more dipolar an…
Hemisphere coupling in Enceladus' asymmetric plasma interaction
Saur, Joachim; Neubauer, Fritz M.; Schilling, Nico
The recently discovered neutral gas plume around the south pole of Enceladus introduces a pronounced north-south asymmetry in the plasma interaction of Saturn's magnetosphere with Enceladus. In this work we present an analytic model for such an asymmetric interaction for both an Alfvénic and a unipolar inductor far field model including the Hall e…
Spatial-Temporal characteristics of ion beamlets in the plasma sheet boundary layer of magnetotail
Grigorenko, Elena E.; Zelenyi, Lev M.; Sauvaud, Jean-Andre
The processes of nonadiabatic ion acceleration occurring in the vicinity of magnetic neutral lines produce highly accelerated (up to 2500 km/s) field-aligned ion beams (beamlets) with transient appearance streaming earthward in the plasma sheet boundary layer (PSBL) of the Earth's magnetotail. Previous studies of these phenomena based on single sp…
Reconstruction of a bipolar magnetic signature in an earthward jet in the tail: Flux rope or 3D guide-field reconnection?
RèMe, H.; Khotyaintsev, Y.; Hasegawa, H. +4 more
Southward-then-northward magnetic perturbations are often seen in the tail plasma sheet, along with earthward jets, but the generation mechanism of such bipolar Bz (magnetic flux rope created through multiple X-line reconnection, transient reconnection, or else) has been controversial. At ∼2313 UT on 13 August 2002, Cluster encountered …
Characteristics of terrestrial foreshock ULF waves: Cluster observations
RèMe, H.; Nilsson, H.; Walker, S. N. +4 more
ULF waves in the terrestrial foreshock observed simultaneously by the four Cluster satellites were analyzed to identify the plasma wave modes and to study the effect of plasma beta on the intrinsic wave properties. The wave properties in the spacecraft and solar wind frames, such as the wave frequency, total wave number, phase speed, and wave pola…
Prediction of the 1-AU arrival times of CME-associated interplanetary shocks: Evaluation of an empirical interplanetary shock propagation model
Cho, K. -S.; Kim, K. -H.; Moon, Y. -J.
The traveltimes of interplanetary (IP) shocks at 1 AU associated with coronal mass ejections (CMEs) can be predicted by the empirical shock arrival (ESA) model of Gopalswamy et al. [2004] based on a constant IP acceleration. We evaluate the ESA model using 91 IP shocks identified from sudden commencement (SC)/sudden impulse (SI) on the Earth and b…
Two-dimensional hybrid model of wave and beam heating of multi-ion solar wind plasma
ViñAs, A. F.; Ofman, L.
We study the heating and the acceleration of protons and heavy ions by waves in the solar wind, as well as the nonlinear influence of heavy ions on the wave structure, using a two-dimensional (2-D) hybrid model. Protons and heavy ions are treated kinetically by solving their equations of motion in the self-consistent electric and magnetic fields o…
Propagation and evolution of a magnetic cloud from ACE to Ulysses
Wang, C.; Du, D.; Hu, Q.
The chance of a magnetic cloud (MC) being observed by widely separated spacecraft is rare. However, such an event provides us a good opportunity to study the propagation and evolution of magnetic cloud in the interplanetary space. A magnetic cloud event observed by ACE at Earth on 4-6 March 1998 is tracked from the location of ACE to Ulysses. Usin…