Search Publications
Resonant instabilities of kinetic Alfvén waves in the Earth's magnetosphere with superthermal electrons
Lakhina, G. S.; Singh, S. V.; Barik, K. C.
A theoretical plasma model for the generation of kinetic Alfvén waves (KAWs), having background Maxwellian ions, κ-electrons, and drifting Maxwellian beam ions, is discussed. The ion beam streams along the ambient magnetic field, whereas velocity shear is perpendicular to it. The role played by nonthermal electrons in the excitation of resonant KA…
Electron trapping in the coma of a weakly outgassing comet
Divin, Andrey; Deca, Jan; Olshevsky, Vyacheslav +2 more
Measurements from the Rosetta mission have shown a multitude of nonthermal electron distributions in the cometary environment, challenging the previously assumed plasma interaction mechanisms near a cometary nucleus. In this paper, we discuss electron trapping near a weakly outgassing comet from a fully kinetic (particle-in-cell) perspective. Usin…
Vibrational and electronic collisional-radiative model in CO2-N2-Ar mixtures for Mars entry problems
Annaloro, Julien; Bultel, Arnaud
To predict the nonequilibrium flows around a hypersonic vehicle entering the Martian atmosphere, the two-temperature collisional-radiative model "CoRaM-MARS" has been developed. The species CO2, CO, C2, CN, N2, NO, O2, C, N, O, Ar, CO+, C2 + , CN+, N…
Generation of kinetic Alfvén waves in dayside magnetopause reconnection: A 3-D global-scale hybrid simulation
Wang, Xueyi; Lin, Yu; Guo, Zhifang +1 more
In this paper, we perform a three-dimensional (3-D) global-scale hybrid simulation to investigate the generation of kinetic Alfvén waves (KAWs) in reconnection at the dayside magnetopause. In the simulation, the magnetopause reconnection takes place due to a self-consistent interaction between the solar wind and Earth's magnetosphere, in which the…
Acceleration of plasma in current sheet during substorm dipolarizations in the Earth's magnetotail: Comparison of different mechanisms
Parkhomenko, Elena I.; Malova, Helmi V.; Grigorenko, Elena E. +6 more
This work is devoted to the investigation of particle acceleration during magnetospheric dipolarizations. A numerical model is presented taking into account the four scenarios of plasma acceleration that can be realized: (A) total dipolarization with characteristic time scales of ≈3 min; (B) single peak value of the normal magnetic component …
A three-dimensional model of spiral null pair to form ion-scale flux ropes in magnetic reconnection region observed by Cluster
Dunlop, Malcolm; He, Jiansen; Xie, Lun +10 more
The magnetic structure and topology of the three-dimensional magnetic reconnection region are significantly dynamic and complex. Small-scale flux ropes and magnetic null points are frequently detected in the reconnection outflow region and diffusion region due to the increased in situ measurements at high temporal cadences. Previous studies have d…
Dust-ion-acoustic modes at comet 67P/Churyumov-Gerasimenko
Chen, Hui; Yang, Weiheng; Liu, Sanqiu
The dynamics of dust-ion-acoustic (DIA) modes at Comet 67P/Churyumov-Gerasimenko, where H2O+ ions with warm and cold electrons as well as dust grains were detected, are investigated within the two-electron-temperature dusty plasmas model by the kinetic theory. In terms of current-driven DIA waves, the bulk electron drift is a…