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Electron-scale shear instabilities: magnetic field generation and particle acce...
Alves, E. P.; Grismayer, T.; Fonseca, R. A.; Silva, L. O.WOS:000333714500001 (Nº de Acesso Web of Science) ; Strong shear flow regions found in astrophysical jets are shown to be important dissipation regions, where the shear flow kinetic energy flow is converted into electric and magnetic field energy via shear instabilities. The emergence of these self-consistent fields makes shear flows significant sites for radiation emission and particle acceleration. We focus ...
dc-Magnetic-Field Generation in Unmagnetized Shear Flows
Grismayer, T.; Alves, E. P.; Fonseca, R. A.; Silva, L. O.WOS:000321278300010 (Nº de Acesso Web of Science) ; The generation of dc magnetic fields in unmagnetized electron-ion shear flows is shown to be associated to either initial thermal effects or the onset of electron-scale shear instabilities, in particular the cold Kelvin-Helmholtz instability. This mechanism, intrinsic to shear gradients on the electron scale, is described through a kinetic model that predicts...
Large-scale magnetic field generation via the kinetic Kelvin-Helmholtz instabil...
Alves, E.P.; Grismayer, T.; Martins, S. F.; Fiuza, F.; Fonseca, R. A.; Silva, L. O.WOS:000300611100001 (Nº de Acesso Web of Science) ; “Prémio Científico ISCTE-IUL 2013” ; Collisionless plasma instabilities are fundamental in magnetic field generation in astrophysical scenarios, but their role has been addressed in scenarios where velocity shear is absent. In this work we show that velocity shears must be considered when studying realistic astrophysical scenarios, since these trigger the co...
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