272 citations · 984 across the 47 of their papers we have counts for
12 papers · 1 filter
The microphysics of collisionless shock waves
A. Marcowith, A. Bret, A. Bykov +12
Collisionless shocks, that is shocks mediated by electromagnetic processes, are customary in space physics and in astrophysics. They are to be found in a great variety of objects a…
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…
Robustness of the filamentation instability for asymmetric plasma shells collision in arbitrarily oriented magnetic field
Antoine Bret
The filamentation instability triggered when two counter streaming plasma shells overlap appears to be the main mechanism by which collisionless shocks are generated. It has been k…
Nonrelativistic parallel shocks in unmagnetized and weakly magnetized plasmas
Jacek Niemiec, Martin Pohl, Antoine Bret +1
We present results of 2D3V particle-in-cell simulations of non-relativistic plasma collisions with absent or parallel large-scale magnetic field for parameters applicable to the co…
CfA Plasma Talks
Antoine Bret
Notes from a series of 13 one hour (or more) lectures on Plasma Physics given to Ramesh Narayan' research group at the Harvard-Smithsonian Center for Astrophysics, between January…
PIC simulation of a thermal anisotropy-driven Weibel instability in a circular rarefaction wave
M. E. Dieckmann, G. Sarri, G. C. Murphy +6
The expansion of an initially unmagnetized planar rarefaction wave has recently been shown to trigger a thermal anisotropy-driven Weibel instability (TAWI), which can generate magn…
Could Cosmic Rays Affect Instabilities in the Transition Layer of Nonrelativistic Collisionless Shocks?
Thomas Stroman, Martin Pohl, Jacek Niemiec +1
There is an observational correlation between astrophysical shocks and non-thermal particle distributions extending to high energies. As a first step toward investigating the possi…
Robustness of the filamentation instability as shock mediator in arbitrarily oriented magnetic field
Antoine Bret, Erica Perez Alvaro
The filamentation instability (sometimes also referred to as "Weibel") is a key process in many astrophysical scenario. In the Fireball model for Gamma Ray Bursts, this instability…
Two-stream-like instability in dilute hot relativistic beams and astrophysical relativistic shocks
Ehud Nakar, Antoine Bret, Milos Milosavljevic
Relativistic collisionless shocks are believed to be efficient particle accelerators. Nonlinear outcome of the interaction of accelerated particles that run ahead of the shock, the…
Intuitive calculation of the relativistic Rayleigh-Taylor instability linear growth rate
A Bret
The Rayleigh-Taylor instability is a key process in many fields of Physics ranging from astrophysics to inertial confinement fusion. It is usually analyzed deriving the linearized…
Magnetic field amplification and electron acceleration to near-energy equipartition with ions by a mildly relativistic quasi-parallel plasma protoshock
Gareth C. Murphy, Mark E. Dieckmann, Antoine Bret +1
The prompt emissions of gamma-ray bursts are seeded by radiating ultrarelativistic electrons. Internal shocks propagating through a jet launched by a stellar implosion, are expecte…
Aperiodic magnetic turbulence produced by relativistic ion beams
Jacek Niemiec, Martin Pohl, Antoine Bret +1
Magnetic-field generation by a relativistic ion beam propagating through an electron-ion plasma along a homogeneous magnetic field is investigated with 2.5D high-resolution particl…