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Title: NONRELATIVISTIC PARALLEL SHOCKS IN UNMAGNETIZED AND WEAKLY MAGNETIZED PLASMAS

Abstract

We present results of 2D3V particle-in-cell simulations of nonrelativistic plasma collisions with absent or parallel large-scale magnetic field for parameters applicable to the conditions at young supernova remnants. We study the collision of plasma slabs of different density, leading to two different shocks and a contact discontinuity. Electron dynamics play an important role in the development of the system. While nonrelativistic shocks in both unmagnetized and magnetized plasmas can be mediated by Weibel-type instabilities, the efficiency of shock-formation processes is higher when a large-scale magnetic field is present. The electron distributions downstream of the forward and reverse shocks are generally isotropic, whereas that is not always the case for the ions. We do not see any significant evidence of pre-acceleration, neither in the electron population nor in the ion distribution.

Authors:
 [1]; ;  [2];  [3]
  1. Instytut Fizyki Jadrowej PAN, ul. Radzikowskiego 152, 31-342 Krakow (Poland)
  2. DESY, D-15738 Zeuthen (Germany)
  3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-51, Cambridge, MA 02138 (United States)
Publication Date:
OSTI Identifier:
22086452
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; ASTRONOMY; ASTROPHYSICS; COMPUTERIZED SIMULATION; COSMIC ELECTRONS; EFFICIENCY; ELECTRON COLLISIONS; ION COLLISIONS; IONS; MAGNETIC FIELDS; PLASMA; PLASMA DENSITY; PLASMA INSTABILITY; PLASMA SIMULATION; SHOCK WAVES; SUPERNOVA REMNANTS

Citation Formats

Niemiec, Jacek, Pohl, Martin, Wieland, Volkmar, and Bret, Antoine, E-mail: jacek.niemiec@ifj.edu.pl. NONRELATIVISTIC PARALLEL SHOCKS IN UNMAGNETIZED AND WEAKLY MAGNETIZED PLASMAS. United States: N. p., 2012. Web. doi:10.1088/0004-637X/759/1/73.
Niemiec, Jacek, Pohl, Martin, Wieland, Volkmar, & Bret, Antoine, E-mail: jacek.niemiec@ifj.edu.pl. NONRELATIVISTIC PARALLEL SHOCKS IN UNMAGNETIZED AND WEAKLY MAGNETIZED PLASMAS. United States. doi:10.1088/0004-637X/759/1/73.
Niemiec, Jacek, Pohl, Martin, Wieland, Volkmar, and Bret, Antoine, E-mail: jacek.niemiec@ifj.edu.pl. Thu . "NONRELATIVISTIC PARALLEL SHOCKS IN UNMAGNETIZED AND WEAKLY MAGNETIZED PLASMAS". United States. doi:10.1088/0004-637X/759/1/73.
@article{osti_22086452,
title = {NONRELATIVISTIC PARALLEL SHOCKS IN UNMAGNETIZED AND WEAKLY MAGNETIZED PLASMAS},
author = {Niemiec, Jacek and Pohl, Martin and Wieland, Volkmar and Bret, Antoine, E-mail: jacek.niemiec@ifj.edu.pl},
abstractNote = {We present results of 2D3V particle-in-cell simulations of nonrelativistic plasma collisions with absent or parallel large-scale magnetic field for parameters applicable to the conditions at young supernova remnants. We study the collision of plasma slabs of different density, leading to two different shocks and a contact discontinuity. Electron dynamics play an important role in the development of the system. While nonrelativistic shocks in both unmagnetized and magnetized plasmas can be mediated by Weibel-type instabilities, the efficiency of shock-formation processes is higher when a large-scale magnetic field is present. The electron distributions downstream of the forward and reverse shocks are generally isotropic, whereas that is not always the case for the ions. We do not see any significant evidence of pre-acceleration, neither in the electron population nor in the ion distribution.},
doi = {10.1088/0004-637X/759/1/73},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}