Search Publications
Multipoint Observations of Magnetosheath Response to Foreshock Transients
Wei, Xinhua; Cai, Chunlin
Multispacecraft observations of the magnetosheath responses to various foreshock transients in a single event on 17 March 2004 are reported in this paper. The Cluster spacecraft recorded long-standing large amplitude ULF waves with both compressive and transverse components in the magnetosheath. Additionally, two transient structures with depressi…
Plasma Turbulence at Comet 67P/Churyumov-Gerasimenko: Rosetta Observations
Halekas, J. S.; Howes, G. G.; Ruhunusiri, S.
We perform a power spectral analysis of magnetic field fluctuations measured by the Rosetta spacecraft's magnetometer at comet 67P/Churyumov-Gerasimenko. We interpret the power spectral signatures in terms of plasma turbulent processes and discover that different turbulent processes are prominent during different active phases of the comet. During…
Suprathermal Fe in the Earth's Plasma Environment: Cluster RAPID Observations
Dandouras, I.; Daly, P. W.; Haaland, S. +2 more
Baryonic matter in geospace is almost exclusively in a plasma state, with protons (H+) and to some extent ionized helium (He) and oxygen (O) being the dominant ion species. But also other heavier ion species and even molecular ions are present in geospace. The Research with Adaptive Particle Imaging Detectors (RAPID) on board the Cluste…
A Survey of Venus Shock Crossings Dominated by Kinematic Relaxation
Pope, S. A.
Collisionless shocks are one of the most effective particle accelerators in the known universe. Even low Mach number shocks could have a significant role in particle heating and acceleration. Theory suggests that kinematic collisionless relaxation, the process whereby a downstream nongyroptopic ion population becomes thermalized through collisionl…
Equatorial Magnetosonic Waves: Do Nonlinear Interactions Play a Role in Their Evolution?
Walker, S. N.; Yearby, K. H.; Balikhin, M. A. +1 more
The occurrence of nonlinear interactions between discrete wave frequencies has been shown to play a significant role in the propagation and evolution of some plasma wave modes. In this paper we take advantage of closely spaced Cluster measurements to investigate the possibility nonlinear interactions occurring between the discrete emissions that a…
Observations of Sounder Accelerated Electrons by Mars Express
Barabash, S.; Winningham, J. D.; Frahm, R. A. +5 more
The electron sensor of the Analyzer of Space Plasmas and Energetic Atoms experiment detects accelerated electrons during pulses of radio emissions from the powerful topside sounder: the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board the Mars Express spacecraft. Accelerated electrons are observed at energies up to 400 …
Simultaneous Polar and Cluster Observations in the Northern and Southern Middle-Altitude Polar Cusps Around Equinox
Berchem, J.; Escoubet, C. P.; Pitout, F. +3 more
We present an event of simultaneous observations of the northern and southern middle-altitude polar cusps by the Polar spacecraft and Cluster fleet that occurred on 23 September 2004. We examine the possible asymmetries in the fields and plasma parameters, although the proximity of the equinox should limit these asymmetries. Ion sensors reveal two…
Generic Magnetic Field Intensity Profiles of Interplanetary Coronal Mass Ejections at Mercury, Venus, and Earth From Superposed Epoch Analyses
Lugaz, Noé; Möstl, Christian; Janvier, Miho +8 more
We study interplanetary coronal mass ejections (ICMEs) measured by probes at different heliocentric distances (0.3-1 AU) to investigate the propagation of ICMEs in the inner heliosphere and determine how the generic features of ICMEs change with heliospheric distance. Using data from the MErcury Surface, Space ENvironment, GEochemistry, and Rangin…
Two-Dimensional gcPIC Simulation of Rising-Tone Chorus Waves in a Dipole Magnetic Field
Wang, Xueyi; Wang, Shui; Lu, Quanming +4 more
Rising-tone chorus waves have already been successfully produced in a mirror magnetic field with the use of one- and two-dimensional particle-in-cell (PIC) simulations. However, in reality, the background magnetic field in the inner Earth's magnetosphere is a dipole magnetic field, unlike symmetric mirror fields. In this paper, with the two-dimens…
Universality of Lower Hybrid Waves at Earth's Magnetopause
Lavraud, B.; Génot, V.; André, M. +15 more
Waves around the lower hybrid frequency are frequently observed at Earth's magnetopause and readily reach very large amplitudes. Determining the properties of lower hybrid waves is crucial because they are thought to contribute to electron and ion heating, cross-field particle diffusion, anomalous resistivity, and energy transfer between electrons…