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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…
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…