The Structure and Dynamics of GRB Jets

Abstract

There are several lines of evidence which suggest that the relativistic outflows in gamma-ray bursts (GRBs) are collimated into narrow jets. The jet structure has important implications for the true energy release and the event rate of GRBs, and can constrain the mechanism responsible for the acceleration and collimation of the jet. Nevertheless, the jet structure and its dynamics as it sweeps up the external medium and decelerates, are not well understood. In this review I discuss our current understanding of GRB jets, stressing their structure and dynamics.

27 pages, 26 figures; invited review for the proceedings of the conference "Triggering Relativistic Jets", held in Cozumel, Mexico, on March 28 to April 1, 2005; accepted for publication in Rev. Mex. A&A

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• Off-Axis Emission of Short GRB Jets from Double Neutron Star Mergers and GRB 170817A
• On the lateral expansion of GRB jets
• Off-axis afterglow light curves and images from 2D hydrodynamic simulations of double-sided GRB jets in a stratified external medium
• GRB jet structure and the jet break
• Gamma-ray burst afterglow blast waves
• Simulation and physical model based gamma-ray burst afterglow analysis
• Multiwavelength observations of GRB 140629A. A long burst with an achromatic jet break in the optical and X-ray afterglow
• Deceleration of relativistic jets with lateral expansion
• The Local-Galactic interpretation of the Gamma-Ray Bursts