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Cluster magnetic fields from large-scale-structure and galaxy-cluster shocks
Mikhail V. Medvedev, Luis O. Silva, Marc Kamionkowski
The origin of the micro-Gauss magnetic fields in galaxy clusters is one of the outstanding problem of modern cosmology. We have performed three-dimensional particle-in-cell simulat…
Long-time evolution of magnetic fields in relativistic GRB shocks
Mikhail V. Medvedev, Massimiliano Fiore, Ricardo A. Fonseca +2
We investigate the long-time evolution of magnetic fields generated by the two-stream instability at ultra- and sub-relativistic astrophysical collisionless shocks. Based on 3D PIC…
Kinetics of Particles in Relativistic Collisionless Shocks
Mikhail V. Medvedev, Luis O. Silva, Ricardo A. Fonseca +2
Charged plasma particles form an anisotropic counter-streaming distribution at the front of a shock. In the near- and ultra-relativistic regimes, Weibel (or two-stream) instability…
Nuclear reaction rates and energy in stellar plasmas : The effect of highly damped modes
Merav Opher, Luis O. Silva, Dean E. Dauger +2
The effects of the highly damped modes in the energy and reaction rates in a plasma are discussed. These modes, with wavenumbers , even being only weakly excited, with…