Interpenetrating Plasma Shells: Near-Equipartition Magnetic Field Generation and Nonthermal Particle Acceleration

We present the first three-dimensional fully kinetic electromagnetic relativistic particle-in-cell simulations of the collision of two interpenetrating plasma shells. The highly accurate plasma-kinetic particle-in-cell (with the total of 108 particles) parallel code OSIRIS has been used. Our simulations show (1) the generation of long-lived near-equipartition (electro)magnetic fields, (2) nonthermal particle acceleration, and (3) short-scale to long-scale magnetic field evolution, in the collision region. Our results provide new insights into the magnetic field generation and particle acceleration in relativistic and subrelativistic colliding streams of particles, which are present in gamma-ray bursters, supernova remnants, relativistic jets, pulsar winds, etc.

[1]  A. B. Langdon,et al.  Relativistic, perpendicular shocks in electron-positron plasmas , 1992 .

[2]  S. V. Bulanov,et al.  Generation of a Small-Scale Quasi-Static Magnetic Field and Fast Particles during the Collision of Electron-Positron Plasma Clouds , 1998 .

[3]  A. Panaitescu,et al.  Properties of Relativistic Jets in Gamma-Ray Burst Afterglows , 2001, astro-ph/0109124.

[4]  D. Gordon,et al.  Spatio-temporal dynamics of the resonantly excited relativistic plasma wave driven by a CO2 laser , 1997 .

[5]  R. Fonseca,et al.  On the role of the purely transverse Weibel instability in fast ignitor scenarios , 2002 .

[6]  Arons,et al.  Structure of relativistic magnetosonic shocks in electron-positron plasmas. , 1988, Physical review letters.

[7]  J. Dawson.  Particle simulation of plasmas , 1983 .

[8]  E. S. Weibel,et al.  Spontaneously Growing Transverse Waves in a Plasma Due to an Anisotropic Velocity Distribution , 1959 .

[9]  M. Medvedev.  Theory of “Jitter” Radiation from Small-Scale Random Magnetic Fields and Prompt Emission from Gamma-Ray Burst Shocks , 2000, astro-ph/0001314.

[10]  Abraham Loeb,et al.  Generation of Magnetic Fields in the Relativistic Shock of Gamma-Ray Burst Sources , 1999, astro-ph/9904363.

[11]  G. Fuller,et al.  New connection between central engine weak physics and the dynamics of gamma-ray burst fireballs , 2000, astro-ph/0009144.

[12]  Gamma-ray bursts and the fireball model , 1998, astro-ph/9810256.

[13]  C. Birdsall,et al.  Plasma Physics via Computer Simulation , 2018 .

[14]  Italy.,et al.  Time resolved spectral analysis of bright gamma ray bursts , 2002, astro-ph/0206377.

[15]  Localization, the clue to fast magnetic reconnection , 2001 .