Search Publications
Terrestrial and Martian space weather: A complex systems approach
Blanco-Cano, Xóchitl; Stepanova, Marina; Mazelle, Christian +19 more
A comparative overview of Terrestrial and Martian space weather is presented, with emphasis on applying the tools of complexity and nonlinear dynamics to study the spatiotemporal dynamics and structures of sun–Earth and sun–Mars space environment. The following topics are reviewed: (1) complex systems approach to solar atmosphere and solar wind; (…
Flapping motion configurations of geomagnetotail current sheet
Dunlop, M.; Rong, Zhaojin; Shen, Chao +5 more
We explore the geometry of the flapping motion of geomagnetotail current sheet with the magnetic measurements of the Cluster (constellation) using a newly developed technique. The principal curvatures and directions of the surfaces of the flapping current sheet are successfully deduced by the normal field analysis (NFA). Results show that the dire…
The impact of cold electrons and cold ions in magnetospheric physics
Delzanno, Gian Luca; Borovsky, Joseph E.; Henderson, Michael G. +3 more
A review of the impact of the cold-ion and cold-electron populations in the Earth's magnetosphere is presented. The cold populations are defined by total energy less than approximately 100 eV, i.e. in the energy range which is strongly affected by spacecraft charging and that often dominates the total plasma density. We also include the warm plasm…
Global and local processes of thin current sheet formation during substorm growth phase
Artemyev, A. V.; Runov, A.; Angelopoulos, V. +4 more
Formation of thin current sheets in Earth's magnetotail is a critical element of the magnetosphere dynamics. The configuration and stability of these thin current sheets control the onset of magnetic reconnection and particle acceleration in the magnetotail during substorms and other geomagnetic activities. In recent years, multipoint observations…
HYPERS simulations of solar wind interactions with the Earth's magnetosphere and the Moon
Chen, Li-Jen; Roytershteyn, Vadim; Omelchenko, Yuri A. +2 more
The hybrid simulations, where the ions are treated kinetically and the electrons as a fluid, seek to describe ion microphysics with maximum physical fidelity. The hybrid approach addresses the fundamental need for space plasma models to incorporate physics beyond magnetohydrodynamics. Global hybrid simulations must account for a wide range of both…
The Dynamics of the Alfvénic Oval
Keiling, Andreas
The auroral oval is a well-established concept, introduced more than five decades ago. The Alfvénic oval, on the other hand, is a very recent concept, which has been revealed in both observational and numerical studies. This is the first review of the global Alfvénic oval, while also defining primary, secondary and tertiary layers of the Alfvénic …
The role of magnetospheric plasma in solar wind-magnetosphere coupling: A review
Walsh, Brian M.; Zou, Ying
A variety of magnetospheric plasma populations have been proposed to impact solar wind-magnetosphere coupling. These magnetospheric populations could mass load the dayside magnetopause and include the plasmaspheric plume, plasma cloak, ion plasma sheet, and dayside ion outflow. Each has different densities, ion composition, and spatial/temporal oc…
Outstanding questions in magnetospheric plasma physics: The pollenzo view
Stepanova, Marina; Hesse, Michael; Delzanno, Gian Luca +6 more
Based on discussions held at a workshop in Bra-Pollenzo, Italy, this paper elaborates upon 19 outstanding questions of plasma physics in the Earth's magnetosphere. The questions are grouped according to (a) driving processes, (b) radiation belt and ring current issues, (c) auroral physics, (d) internal plasma processes, and (e) magnetosphere-ionos…
On the source region and orientations of nightside auroral arcs
Sergeev, V.; Bondareva, T.; Gilles, D. +1 more
Using large data base of stable auroral arcs observed at Gillam we identified those passes of POES spacecraft which were magnetically conjugate to these arcs. We studied statistically arc locations with respect to the energetic particle isotropy boundaries (IBs), which are the well-known markers of the magnetotail regions. In the dusk and night se…
On the linear theory of oblique magnetospheric chorus excitation
Bespalov, P. A.; Savina, O. N.
Some aspects of the theory of generation of magnetospheric chorus are discussed. An original approach to solving the problem of oblique chorus generation near the Gendrin angle is outlined and partially realized within the framework of a beam pulsed amplifier mechanism. Parameters of the resonance electron beam in the chorus excitation region are …