Séminaire Doctoral / Seminar PhD |
| « PIC simulation of relativistic collisionless shocks » |
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Arno Vanthieghem |
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Among other powerful relativistic astrophysical objects, gamma-ray bursts, blazars, pulsar winds provide an ideal environment to understand the acceleration mechanisms of high energy charged particles. The high-energy electromagnetic spectra of these sources generically follow a power law distribution attributed to synchrotron and inverse Compton radiations of non-thermal particles. These non-thermal spectra can naturally be linked to the presence of relativistic outflows through a conversion of kinetic or Poynting flux in a non-thermal particle energy distribution in relativistic shocks through the development of microscopic plasma instabilities. A deep insight into these phenomena requires an understanding of the micro-physics of collisionless shocks. This can be done via Particle In Cell (PIC) simulations, which provide ab initio numerical experiments of the acceleration mechanism properties and their efficiency.
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mercredi 21 juin 2017 - 17:00 Salle Entresol Daniel Chalonge, Institut d'Astrophysique |
| Page web du séminaire / Seminar's webpage |