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9 papers · 1 filter
Bright gamma-ray flares powered by magnetic reconnection in QED-strength magnetic fields
K. M. Schoeffler, T. Grismayer, D. Uzdensky +2
Strong magnetic fields in magnetospheres of neutron stars (especially magnetars) and other astrophysical objects may release their energy in violent, intense episodes of magnetic r…
Fully kinetic large scale simulations of the collisionless Magnetorotational instability
Giannandrea Inchingolo, Thomas Grismayer, Nuno F. Loureiro +2
We present two-dimensional particle-in-cell (PIC) simulations of the fully kinetic collisionless magnetorotational instability (MRI) in weakly magnetized (high ) pair plasma. Th…
Shock formation in electron-ion plasmas: mechanism and timing
Anne Stockem Novo, Antoine Bret, Ricardo A. Fonseca +1
We analyse the full shock formation process in electron-ion plasmas in theory and simulations. It is accepted that electromagnetic shocks in initially unmagnetised relativistic pla…
Electron-scale shear instabilities: magnetic field generation and particle acceleration in astrophysical jets
E. P. Alves, T. Grismayer, R. A. Fonseca +1
Strong shear flow regions found in astrophysical jets are shown to be important dissipation regions, where the shear flow kinetic energy is converted into electric and magnetic fie…
The impact of kinetic effects on the properties of relativistic electron-positron shocks
A. Stockem, F. Fiuza, R. A. Fonseca +1
We assess the impact of non-thermally shock-accelerated particles on the magnetohydrodynamic (MHD) jump conditions of relativistic shocks. The adiabatic constant is calculated dire…
Acceleration in perpendicular relativistic shocks for plasmas consisting of leptons and hadrons
A. Stockem, F. Fiuza, R. A. Fonseca +1
We investigate the acceleration of light particles in perpendicular shocks for plasmas consisting of a mixture of leptonic and hadronic particles. Starting from the full set of con…