Baryon loading and the Weibel instability in gamma-ray bursts
arXiv:astro-ph/0608519 · doi:10.1111/j.1365-2966.2006.10980.x
Abstract
The dynamics of two counter-streaming electron-positron-ion unmagnetized plasma shells with zero net charge is analyzed in the context of magnetic field generation in GRB internal shocks due to the Weibel instability. The effects of large thermal motion of plasma particles, arbitrary mixture of plasma species and space charge effects are taken into account. We show that, although thermal effects slow down the instability, baryon loading leads to a non-negligible growth rate even for large temperatures and different shell velocities, thus guaranteeing the robustness and the occurrence of the Weibel instability for a wide range of scenarios.
6 pages, 4 figures. Accepted for publication in MNRAS
References in corpus (12)
- Gamma-Ray Bursts and the Fireball Model
- Generation of Magnetic Fields in the Relativistic Shock of Gamma-Ray-Burst Sources
- Interpenetrating plasma shells: near-equipartition magnetic field generation and non-thermal particle acceleration
- Polarization of the prompt gamma-ray emission from the gamma-ray burst of 6 December 2002
- Magnetic Field Generation in Collisionless Shocks; Pattern Growth and Transport
- Particle Acceleration in Relativistic Jets due to Weibel Instability
- Long-time evolution of magnetic fields in relativistic GRB shocks
- Cosmological GRBs: Internal vs. External Shocks
- Power Density Spectra of Gamma-Ray Bursts in the Internal Shock Model
- New direction for gamma-rays
- Magnetic field generation in relativistic shocks - An early end of the exponential Weibel instability in electron-proton plasmas
- Constraints on the bulk Lorentz factor in the internal shock scenario for gamma-ray bursts
Cited by in corpus (8)
- Cumulative effect of Weibel-type instabilities in counterstreaming plasmas with non-Maxwellian anisotropies
- Nonrelativistic parallel shocks in unmagnetized and weakly magnetized plasmas
- Simulation study of the filamentation of counter-streaming beams of the electrons and positrons in plasmas
- Acceleration in perpendicular relativistic shocks for plasmas consisting of leptons and hadrons
- Probing Strange Stars with Advanced Gravitational Wave Detectors
- Robustness of the filamentation instability as shock mediator in arbitrarily oriented magnetic field
- Knot in Cen A: Stochastic Magnetic Field for Diffusive Synchrotron Radiation?
- The baryon loading effect on relativistic astrophysical jet transport in the interstellar medium