Origin of Intense Electron Heating in Relativistic Blast Waves
| Autor: | Arno Vanthieghem, Martin Lemoine, Laurent Gremillet |
|---|---|
| Přispěvatelé: | Institut Lagrange de Paris, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), National Institutes of Natural Sciences [Tokyo] (NINS), Department of Astrophysical Sciences [Princeton], Princeton University, SLAC National Accelerator Laboratory (SLAC), Stanford University, DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Matière sous Conditions Extrêmes (LMCE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, the NSF grants PHY-1804048 and AST-1814708, A0030407666 made by GENCI and on CORI at the National Energy Research Scientific Computing Center (NERSC) through ALCC award, ANR-10-LABX-0063,ILP,Institute Lagrange of Paris(2010), ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), ANR-14-CE33-0019,MACH,Micro-Astro-CHocs(2014), ANR-20-CE30-0030,UnRIP,Vers la compréhension des instabilités plasma relativistes(2020) |
| Rok vydání: | 2022 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Plasma Physics (physics.plasm-ph) Physics::Plasma Physics Space and Planetary Science Astrophysics::High Energy Astrophysical Phenomena Physics::Space Physics FOS: Physical sciences Astronomy and Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Astrophysics - High Energy Astrophysical Phenomena [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] Physics - Plasma Physics |
| Zdroj: | Astrophys.J.Lett. Astrophys.J.Lett., 2022, 930 (1), pp.L8. ⟨10.3847/2041-8213/ac634f⟩ |
| ISSN: | 2041-8213 2041-8205 |
| Popis: | The modeling of gamma-ray burst afterglow emission bears witness to strong electron heating in the precursor of Weibel-mediated, relativistic collisionless shock waves propagating in unmagnetized electron-ion plasmas. In this Letter, we propose a theoretical model, which describes electron heating via a Joule-like process caused by pitch-angle scattering in the decelerating, self-induced microturbulence and the coherent charge-separation field induced by the difference in inertia between electrons and ions. The emergence of this electric field across the precursor of electron-ion shocks is confirmed by large-scale particle-in-cell (PIC) simulations. Integrating the model using a Monte Carlo-Poisson method, we compare the main observables to the PIC simulations to conclude that the above mechanism can indeed account for the bulk of electron heating. Comment: 9 pages, 8 figures; to be published in Astrophysical Journal Letters |
| Databáze: | OpenAIRE |
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