Search Publications
Three-dimensional density and compressible magnetic structure in solar wind turbulence
Narita, Yasuhito; Roberts, Owen W.; Escoubet, C. -Philippe
The three-dimensional structure of both compressible and incompressible components of turbulence is investigated at proton characteristic scales in the solar wind. Measurements of the three-dimensional structure are typically difficult, since the majority of measurements are performed by a single spacecraft. However, the Cluster mission consisting…
A new method to identify flux ropes in space plasmas
He, Jiansen; Yuan, Zhigang; Yu, Xiongdong +10 more
Flux ropes are frequently observed in the space plasmas, such as solar wind, planetary magnetosphere and magnetosheath etc., and play an important role in the reconnection process and mass and flux transportation. One usually uses bipolar signature and strong core field to identify the flux ropes. We propose here one new method to identify flux ro…
Energy conversion through mass loading of escaping ionospheric ions for different Kp values
Slapak, Rikard; Yamauchi, Masatoshi
By conserving momentum during the mixing of fast solar wind flow and slow planetary ion flow in an inelastic way, mass loading converts kinetic energy to other forms - e.g. first to electrical energy through charge separation and then to thermal energy (randomness) through gyromotion of the newly born cold ions for the comet and Mars cases. Here, …
Non-Gaussianity and cross-scale coupling in interplanetary magnetic field turbulence during a rope-rope magnetic reconnection event
Miranda, Rodrigo A.; Chian, Abraham C. -L.; Schelin, Adriane B. +1 more
In a recent paper (Chian et al., 2016) it was shown that magnetic reconnection at the interface region between two magnetic flux ropes is responsible for the genesis of interplanetary intermittent turbulence. The normalized third-order moment (skewness) and the normalized fourth-order moment (kurtosis) display a quadratic relation with a parabolic…
Statistical survey of day-side magnetospheric current flow using Cluster observations: bow shock
Glassmeier, Karl-Heinz; Liebert, Evelyn; Nabert, Christian
We present the first comprehensive statistical survey of the day-side terrestrial bow shock current system based on a large number of Cluster spacecraft bow shock crossings. Calculating the 3-D current densities using fluxgate magnetometer data and the curlometer technique enables the investigation of current locations, directions, and magnitudes …
Periodic self-reformation of rippled perpendicular collisionless shocks in two dimensions
Umeda, Takayuki; Daicho, Yuki
Large-scale two-dimensional (2-D) full particle-in-cell (PIC) simulations are carried out for studying periodic self-reformation of a supercritical collisionless perpendicular shock with an Alfvén-Mach number MA∼6.
Previous self-consistent one-dimensional (1-D) hybrid and full PIC simulations have demonstrated that the periodic ref…On application of asymmetric Kan-like exact equilibria to the Earth magnetotail modeling
Semenov, Vladimir S.; Erkaev, Nikolai V.; Kubyshkina, Marina V. +3 more
A specific class of solutions of the Vlasov-Maxwell equations, developed by means of generalization of the well-known Harris-Fadeev-Kan-Manankova family of exact two-dimensional equilibria, is studied. The examined model reproduces the current sheet bending and shifting in the vertical plane, arising from the Earth dipole tilting and the solar win…
Data mining for vortices on the Earth's magnetosphere - algorithm application for detection and analysis
Collado-Vega, Yaireska M.; Kalb, Virginia L.; Sibeck, David G. +2 more
Unsteady processes in the solar wind-magnetosphere interaction, such as vortices developed at the magnetopause boundary by the Kelvin-Helmholtz instability, may contribute to the process of mass, momentum and energy transfer into the Earth's magnetosphere. The research described in this paper validates an algorithm to automatically detect and char…