Search Publications
Evolution of the Solar Wind Speed with Heliocentric Distance and Solar Cycle. Surprises from Ulysses and Unexpectedness from Observations of the Solar Corona
Malova, H. V.; Zelenyi, L. M.; Bemporad, A. +5 more
An extensive analysis of Ulysses observations of the solar wind speed V from 1990 to 2008 is undertaken. It is shown that the evolution of V with heliocentric distance r depends substantially on both the heliolatitude and the solar activity cycle. Deviations from the predicted Parker's profile of V(r) are so considerable that cannot be explained b…
Hall Effect in Laboratory and Space Current Sheets
Petrukovich, A. A.; Nakamura, R.; Artemyev, A. V. +2 more
The role of the Hall effect in the formation of thin current sheets (CSs) is analyzed by comparing results of laboratory and satellite experiments. In spite of the strong difference in the plasma parameters, both laboratory and space CSs are characterized by the hot ion component and cold isotropic electron component. Such a relation between the i…
3D Magnetic Holes in Collisionless Plasmas
Artemyev, A.; Vasko, I.; Yushkov, E. +1 more
Recent multispacecraft observations in the Earth's magnetosphere have revealed an abundance of magnetic holes—localized magnetic field depressions. These magnetic holes are characterized by the plasma pressure enhancement and strongly localized currents flowing around the hole boundaries. There are several numerical and analytical models describin…
Time Evolution of the Macroscopic Characteristics of a Thin Current Sheet in the Course of Its Formation in the Earth's Magnetotail
Malova, H. V.; Popov, V. Yu.; Domrin, V. I.
A numerical model is developed that allows tracing the time evolution of a current sheet from a relatively thick current configuration with isotropic distributions of the pressure and temperature in an extremely thin current sheet, which plays a key role in geomagnetic processes. Such a configuration is observed in the Earth's magnetotail in the s…
Adiabatic Heating of Electrons in the Magnetospheric Current Sheet
Petrukovich, A. A.; Artemyev, A. V.; Lukin, A. S. +1 more
Electron dynamics and acceleration in an electromagnetic field configuration modeling the current sheet configuration of the Earth's magnetotail region is investigated. A focus is made on the role of the dawn‑dusk magnetic field component By in the convection electron heating by an electric field Ey. For numerical integration…