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North-south asymmetry in global distribution of the solar wind speed during 1985-2013

Tokumaru, Munetoshi; Fujiki, Ken'ichi; Iju, Tomoya

Interplanetary scintillation (IPS) observations made between 1985 and 2013 are used to investigate the north-south (N-S) asymmetry in global distribution of the solar wind speed. The IPS observations clearly demonstrate that the global distribution of the solar wind speed systematically changes with the solar activity. This change is found to clos…

Hypervelocity dust impacts on the Wind spacecraft: Correlations between Ulysses and Wind interstellar dust detections

Horanyi, Mihaly; Andersson, Laila; Malaspina, David M. +1 more

The Wind spacecraft is positioned just sunward of Earth at the first Lagrange point, while the Ulysses spacecraft orbits above and below the ecliptic plane crossing the ecliptic as far from the Sun as the orbit of Jupiter (∼5 AU). While Wind does not carry a dedicated dust detector, we demonstrate the ability of Wind electric field measurements to…

A new stationary analytical model of the heliospheric current sheet and the plasma sheet

Malova, Helmi V.; Kislov, Roman A.; Khabarova, Olga V.

We develop a single-fluid 2-D analytical model of the axially symmetric thin heliospheric current sheet (HCS) embedded into the heliospheric plasma sheet (HPS). A HCS-HPS system has a shape of a relatively thin plasma disk limited by separatrices that also represent current sheets, which is in agreement with Ulysses observations in the aphelion, w…

Supercriticality of ICME and CIR shocks

Zhou, Xiaoyan; Smith, Edward J.

Interplanetary coronal mass ejection (ICME) and corotating interaction region (CIR) shocks are characterized in terms of supercriticality introduced by Edmiston and Kennel (1984) to classify shocks based on whether dissipation is provided by electron resistivity alone or also requires ion viscosity. The condition for determining supercriticality i…

Interpreting Ulysses data using inverse scattering theory: Oblique Alfvén waves

Wheeler, Harry R.; Reynolds, M. A.; Hamilton, R. L.

Solitary wave structures observed by the Ulysses spacecraft in the solar wind were analyzed using both inverse scattering theory and direct numerical integration of the derivative nonlinear Schrödinger (DNLS) equation. Several of these structures were found to be consistent with soliton solutions of the DNLS equation. Such solitary structures have…