Repeated Bifurcation of Relativistic Magnetic Pulse and Cosmic Gamma-Ray Bursts

Details Repeated Bifurcation of Relativistic Magnetic Pulse and Cosmic Gamma-Ray Bursts Repeated Bifurcation of Relativistic Magnetic Pulse and Cosmic Gamma-Ray Bursts

2003-08-18

arxiv.org/abs/astro-ph/0308301v1

Astronomy and Astrophysics

Astrophysics

5 figures, submitted to and revised for Physical Review Letters

Scientific paper

The diverse and complex light curves of gamma-ray bursts (GRBs) remain an outstanding astrophysical mystery. Here we report the results of 2-1/2-dimensional particle-in-cell (PIC) simulations of the relativistic expansion of magnetized electron-positron plasmas. When the simulation is carried to >150 light-crossing time of the initial plasma, the plasma pulse reproduces many of the GRB features. Remarkably, the plasma pulse bifurcates repeatedly, leading to a complex, multi-peak structure at late times, resembling GRB profiles.

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