Gamma-ray Burst Prompt Emission: Jitter Radiation in Stochastic Magnetic Field Revisited

Abstract

We revisit the radiation mechanism of relativistic electrons in the stochastic magnetic field and apply it to the high-energy emissions of gamma-ray bursts (GRBs). We confirm that jitter radiation is a possible explanation for GRB prompt emission in the condition of a large electron deflection angle. In the turbulent scenario, the radiative spectral property of GRB prompt emission is decided by the kinetic energy spectrum of turbulence. The intensity of the random and small-scale magnetic field is determined by the viscous scale of the turbulent eddy. The microphysical parameters ${\epsilon }_e$ and ${\epsilon }_B$ can be obtained. The acceleration and cooling timescales are estimated as well. Due to particle acceleration in magnetized filamentary turbulence, the maximum energy released from the relativistic electrons can reach a value of about $10^{14}$ eV. The GeV GRBs are possible sources of high-energy cosmic-ray.

ApJ accepted, commments are welcome

References in corpus (14)

• Particle acceleration in relativistic collisionless shocks: Fermi process at last?
• On the Momentum Diffusion of Radiating Ultrarelativistic Electrons in a Turbulent Magnetic Field
• Gamma-ray Burst 080319B: Evidence for Relativistic Turbulence, Not Internal Shocks
• A new model for infrared and submillimetre counts
• Expected high energy emission from GRB 080319B and origins of the GeV emission of GRBs 080514B, 080916C and 081024B
• Production of magnetic energy by macroscopic turbulence in GRB afterglows
• Fermi observations of high-energy gamma-ray emission from GRB 090217A
• Radiative cooling in relativistic collisionless shocks. Can simulations and experiments probe relevant GRB physics?
• Interpretation and implication of the non-detection of GeV spectrum excess by Fermi gamma-ray Space Telescope in most GRBs
• Modeling Spectral Variability of Prompt GRB Emission within the Jitter Radiation Paradigm
• Jitter radiation in gamma-ray bursts and their afterglows: emission and self-absorption
• Knot in Cen A: Stochastic Magnetic Field for Diffusive Synchrotron Radiation?
• Jitter radiation images, spectra, and light curves from a relativistic spherical blastwave
• Is the Gamma Ray Bursts emission suppressed at high energy?

Cited by in corpus (6)

• The effect of cooling on particle trajectories and acceleration in relativistic magnetic reconnection
• The polarization-angle flip in GRB prompt emission
• Prospects for Time-Domain and Multi-Messenger Science with eXTP
• Spectral Diversities of Gamma-ray Bursts in High Energy Bands: Hints from Turbulent Cascade
• Jitter radiation: towards TeV-photons of gamma-ray bursts
• Jitter Mechanism as a Kind of Coherent Radiation: Constrained by the GRB 221009A Emission at 18 TeV