Search Publications
Off-season lee wave cloud over the Arsia Mons in Mars: A study based on Mars Colour Camera (MCC)
Kalita, Jyotirmoy; Guha, Anirban
The present analysis reported the lee wave interpretation on Arsia Mons Elongated Cloud (AMEC) that used to appear over the lee side of the Arsia Mons. The present work also reported the wavelength, the cloud's height, and wind speed of the observed lee wave structure. The estimated wind speed is 86 ± 4.9 m/s, with a wavelength of 60 ± 0.3 km at a…
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…
Relations among eruptive prominence properties, flare evolution and CME kinematics in large solar energetic particle events
Koleva, K.; Duchlev, P.; Dechev, M.
We report a detailed study of the relationship between solar filament eruption, flare productivity and CME kinematics relevant to Solar Energetic Particle (SEP) events. We analyze kinematics and morphological behaviors of 32 filament eruptions appearing during the Solar Cycle 24, between Aug 14, 2010 and April 18, 2016. For our analysis a high res…
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…
Chain of responses of geomagnetic and ionospheric storms to a bunch of central coronal hole and high speed stream of solar wind
Gulyaev, R. A.; Gulyaeva, T. L.
Results of analysis of the proxy of Coronal Hole (CH) Power index, Pch, combined with the high speed streams HSS of solar wind for a period from 2011 to 2019 are presented. It is found that the long-term variation of Pch index shows a trend of growing Pch towards the minimum of solar cycle while most of other identities of solar activity tend to d…
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…