Search Publications
Revisiting mirror modes in the plasma environment of comet 67P/Churyumov-Gerasimenko
Goetz, Charlotte; Volwerk, Martin; Tello Fallau, Ariel +2 more
The plasma environment of comet 67P provides a unique laboratory to study plasma phenomena in the interplanetary medium. There, waves are generated which help the plasma relax back to stability through wave-particle interactions, transferring energy from the wave to the particles and vice versa. In this study, we focus on mirror-mode-like structur…
Statistical distribution of mirror-mode-like structures in the magnetosheaths of unmagnetized planets - Part 2: Venus as observed by the Venus Express spacecraft
Stenberg Wieser, Gabriella; Futaana, Yoshifumi; Mazelle, Christian +7 more
In this series of papers, we present statistical maps of mirror-mode-like (MM) structures in the magnetosheaths of Mars and Venus and calculate the probability of detecting them in spacecraft data. We aim to study and compare them with the same tools and a similar payload at both planets. We consider their dependence on extreme ultraviolet (EUV) s…
Local bow shock environment during magnetosheath jet formation: results from a hybrid-Vlasov simulation
Pfau-Kempf, Yann; Ganse, Urs; Battarbee, Markus +11 more
Magnetosheath jets are plasma structures that are characterised by enhanced dynamic pressure and/or plasma velocity. In this study, we investigate the formation of magnetosheath jets in four two-dimensional simulation runs of the global magnetospheric hybrid-Vlasov model Vlasiator. We focus on jets whose origins were not clearly determined in a pr…
Concerning the detection of electromagnetic knot structures in space plasmas using the wave telescope technique
Motschmann, Uwe; Glassmeier, Karl-Heinz; Toepfer, Simon
The wave telescope technique is broadly established in the analysis of spacecraft data and serves as a bridge between local measurements and the global picture of spatial structures. The technique is originally based on plane waves and has been extended to spherical waves, phase-shifted waves and planetary magnetic field representation. The goal o…
The m-dimensional spatial Nyquist limit using the wave telescope for larger numbers of spacecraft
Motschmann, Uwe; Plaschke, Ferdinand; Glassmeier, Karl-Heinz +2 more
Spacecraft constellations consisting of multiple satellites are becoming more and more interesting not only for commercial use but also for space science missions. The proposed and accepted scientific multi-satellite missions that will operate within Earth's magnetospheric environment, like HelioSwarm, require researchers to extend established met…
Velocity of magnetic holes in the solar wind from Cluster multipoint measurements
Raptis, Savvas; Karlsson, Tomas; Trollvik, Henriette
We present the first statistical study on the velocity of magnetic holes (MHs) in the solar wind. Magnetic holes are localized depressions of the magnetic field, often divided into two classes: rotational and linear MHs. We have conducted a timing analysis of observations of MHs from the Cluster mission in the first quarter of 2005. In total, 69 e…
Magnetospheric Response To Solar Wind Forcing: Ultra-Low-Frequency Wave-Particle Interaction Perspective
Zong, Qiugang
Solar wind forcing, e.g., interplanetary shock and/or solar wind dynamic pressure pulses impacting Earth's magnetosphere, manifests many fundamental important space physics phenomena, including producing electromagnetic waves, plasma heating, and energetic particle acceleration. This paper summarizes our present understanding of the magnetospheric…
Solar wind magnetic holes can cross the bow shock and enter the magnetosheath
Raptis, Savvas; Karlsson, Tomas; Nilsson, Hans +2 more
Solar wind magnetic holes are localized depressions of the magnetic field strength, on timescales of seconds to minutes. We use Cluster multipoint measurements to identify 26 magnetic holes which are observed just upstream of the bow shock and, a short time later, downstream in the magnetosheath, thus showing that they can penetrate the bow shock …
Statistical study and corresponding evolution of plasmaspheric plumes under different levels of geomagnetic storms
Yuan, Zhigang; Ouyang, Zhihai; Deng, Xiaohua +4 more
Using observations of Van Allen Probes, we present a statistical study of plasmaspheric plumes in the inner magnetosphere. Plasmaspheric plumes tend to occur during the recovery phase of geomagnetic storms. Furthermore, the results imply that the occurrence rate of observed plasmaspheric plume in the inner magnetosphere is larger during stronger g…
Dayside magnetopause reconnection and flux transfer events under radial interplanetary magnetic field (IMF): BepiColombo Earth-flyby observations
Trattner, Karlheinz J.; Saito, Yoshifumi; Zong, Qiu-Gang +8 more
This study analyzes the flux transfer event (FTE)-type flux ropes and magnetic reconnection around the dayside magnetopause during BepiColombo's Earth flyby. The magnetosheath has a high plasma β (∼ 8), and the interplanetary magnetic field (IMF) has a significant radial component. Six flux ropes are identified around the magnetopause. The motion …