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Open AccessFeature PaperReview

Physics and Phenomenology of Weakly Magnetized, Relativistic Astrophysical Shock Waves

1
High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
2
Institut d’Astrophysique de Paris, CNRS–Sorbonne Université, 98 bis boulevard Arago, F-75014 Paris, France
3
Sorbonne Université, Institut Lagrange de Paris (ILP), 98 bis bvd Arago, F-75014 Paris, France
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Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse III, OMP, CNRS, 9 avenue Colonel Roche, BP 44346-31028, Toulouse, France
5
LULI, CNRS, CEA, Sorbonne Université, Ecole Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau Cedex, France
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CEA, DAM, DIF, F-91297 Arpajon, France
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UJF-Grenoble, CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG), F-38041 Grenoble, France
*
Author to whom correspondence should be addressed.
Galaxies 2020, 8(2), 33; https://doi.org/10.3390/galaxies8020033
Received: 31 January 2020 / Revised: 25 March 2020 / Accepted: 28 March 2020 / Published: 10 April 2020
(This article belongs to the Special Issue Particle Acceleration Processes in Astrophysical Jets)
Weakly magnetized, relativistic collisionless shock waves are not only the natural offsprings of relativistic jets in high-energy astrophysical sources, they are also associated with some of the most outstanding displays of energy dissipation through particle acceleration and radiation. Perhaps their most peculiar and exciting feature is that the magnetized turbulence that sustains the acceleration process, and (possibly) the secondary radiation itself, is self-excited by the accelerated particles themselves, so that the phenomenology of these shock waves hinges strongly on the microphysics of the shock. In this review, we draw a status report of this microphysics, benchmarking analytical arguments with particle-in-cell simulations, and extract consequences of direct interest to the phenomenology, regarding, in particular, the so-called microphysical parameters used in phenomenological studies. View Full-Text
Keywords: collisionless shock in plasma; shock waves and discontinuities; cosmic ray acceleration; plasma microinstabilities collisionless shock in plasma; shock waves and discontinuities; cosmic ray acceleration; plasma microinstabilities
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Vanthieghem, A.; Lemoine, M.; Plotnikov, I.; Grassi, A.; Grech, M.; Gremillet, L.; Pelletier, G. Physics and Phenomenology of Weakly Magnetized, Relativistic Astrophysical Shock Waves. Galaxies 2020, 8, 33.

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