Generation of Magnetic Fields in the Relativistic Shock of Gamma-Ray-Burst Sources

Abstract

We show that the relativistic two-stream instability can naturally generate strong magnetic fields with 1e-5 - 1e-1 of the equipartition energy density, in the collisionless shocks of Gamma-Ray-Burst (GRB) sources. The generated fields are parallel to the shock front and fluctuate on the very short scale of the plasma skin depth. The synchrotron radiation emitted from the limb-brightened source image is linearly polarized in the radial direction relative to the source center. Although the net polarization vanishes under circular symmetry, GRB sources should exhibit polarization scintillations as their radio afterglow radiation gets scattered by the Galactic interstellar medium. Detection of polarization scintillations could therefore test the above mechanism for magnetic field generation.

12 pages, 2 figures included. Submitted to ApJ

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• Afterglow Linear Polarization Signatures from Shallow GRB Jets: Implications for Energetic GRBs
• Core-collapse Supernovae and Gamma-ray Bursts in TMT Era
• Characterizing filamentary magnetic structures in counter-streaming plasmas by Fourier analysis of proton images
• Gamma-ray bursts afterglows in magnetized stellar winds
• Non-linear Weibel-type Soliton Modes
• Relativistic Jets: Open Problems and Challenges
• Diffusive acceleration in relativistic shocks: particle feedback
• Relativistic oblique shocks with ordered or random magnetic fields: tangential field governs
• Varying linear polarisation in the dust-free GRB 210610B
• On the Polarized Absorption Lines in Gamma-ray Burst Optical Afterglows
• Modeling the Radio and X-ray Emission of SN 1993J and SN 2002ap
• Cosmic rays acceleration at ultrarelativistic subshocks
• Polarization radiation with turbulent magnetic fields from X-ray binaries
• The Giant Flare from SGR 1806-20 and its Radio Afterglow
• Fast growing instabilities for non-parallel flows
• Modeling Magnetic Field Amplification in Nonlinear Diffusive Shock Acceleration
• Phase-transient hierarchical turbulence as an energy correlation generator of blazar light curves
• The elusive synchrotron precursor of collisionless shocks
• Biermann battery effects on the turbulent dynamo in a colliding plasma jets produced by high-power lasers
• Evolution of three-dimensional Relativistic Ion Weibel Instability: Competition with Kink Instability
• The Generation of Magnetic Fields and X-ray Observations
• On particle acceleration and trapping by Poynting flux dominated flows
• Time-averaging Polarimetric and Spectral Properties of Gamma-Ray Bursts
• Interstellar Scintillations of Polarization of Compact Sources
• Polarization of gamma-ray burst afterglows in the synchrotron self-Compton process from a highly relativistic jet
• PIC simulation study of the interaction between a relativistically moving leptonic micro-cloud and ambient electrons
• Long Term Evolution of Magnetic Turbulence in Relativistic Collisionless Shocks
• Property of downstream turbulence driven by the special relativistic shock-clump interaction
• Radiation From Particles Moving in Small-Scale Magnetic Fields Created in Solid-Density Laser-Plasma Laboratory Experiments
• Spectral Diversities of Gamma-ray Bursts in High Energy Bands: Hints from Turbulent Cascade
• Polarization in Gamma-Ray Bursts Produced by Pinch Discharge
• Density filamentation nonlinearly driven by the Weibel instability in relativistic beam plasmas
• An RMHD study of transition between prompt and afterglow GRB phases
• Relativistic shock acceleration and some consequences
• Pair-beam propagation in a magnetised plasma for modelling the polarized radiation emission from gamma-ray bursts in laboratory astrophysics experiments
• Synchro-Curvature Self-Compton Radiation of Electrons in Curved Magnetic Fields
• Ion-electron instabilities in the precursor of weakly magnetized, transrelativistic shocks
• Particle Acceleration, Magnetic Field Generation, and Emission in Relativistic Shocks
• Plasmas in Gamma-Ray Bursts: particle acceleration, magnetic fields, radiative Processes and environments
• Energy partition in collisionless counterstreaming plasmas
• Radiation transport equations in non-Riemannian space-times
• Electron-Ion Temperature Ratio in Transrelativistic Unmagnetized Shock Waves
• Properties of magnetic turbulence in GRB afterglows
• Hard X-ray Polarimetry -- An overview of the method, science drivers and recent findings
• Fermi acceleration in relativistic collisionless plasma shocks correlates with anisotropic energy gains
• Particle trajectories in Weibel filaments: influence of external field obliquity and chaos
• Early time optical polarization of GRB Afterglows: GRB 060418 and GRB 090102
• Theory of the Jitter radiation in a magnetized plasma accompanying temperature gradient
• The Synchrotron Low-Energy Spectrum Arising from the Cooling of Electrons in Gamma-Ray Bursts
• 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
• Spontaneous magnetization of collisionless plasma through the action of a shear flow
• Shock corrugation to the rescue of the internal shock model in microquasars: The single-scale MHD view
• Macroscopic magnetization of primordial plasma by virial shocks
• Science with a large field-of-view polarization survey: The Large Array Survey Telescope Polarization Node (LAST-P)
• Electron penetration heating in turbulent magnetic loops driven by nonrelativistic laser-plasma interaction
• Gamma ray emission from magnetized relativistic GRB outflows
• Turbulence induced additional deceleration in relativistic shock wave propagation: implications for gamma-ray burst
• The most distant optically polarised GRB afterglow: GRB 240419A at z = 5.178
• Radiation from relativistic jets
• Weibel Instability Driven by Relativistic Pair Jets: Particle Acceleration, Magnetic Field Generation, and Emission
• Episode-wise spectro-polarimetry of GRB 220107A: Testing the hypothesis of evolving radiation mechanisms
• GRB 260310A / SN 2026fgk: A Multi-Wavelength Study of a Nearby Underluminous Long GRB and SN with a Complex Afterglow
• Biermann-battery driven magnetized collisionless shock precursors in laser produced plasmas
• Magnetized Current Filaments as a Source of Circularly Polarized Light