Numerical Simulations of Gamma-Ray Burst Explosions

TL;DR

This review discusses how numerical simulations have significantly advanced understanding of gamma-ray burst phenomena by modeling jet dynamics, radiation mechanisms, and integrating observational data.

Contribution

It highlights recent progress in numerical modeling of gamma-ray bursts, covering jet behavior, launching, acceleration, and radiation, and emphasizes combining simulations with observations.

Findings

Numerical models have improved understanding of jet propagation and burst phenomenology.

Simulations combined with observations have clarified radiation mechanisms.

Challenges remain in modeling complex burst environments.

Abstract

Gamma-ray bursts are a complex, non-linear system that evolves very rapidly through stages of vastly different conditions. They evolve from scales of few hundred kilometers where they are very dense and hot to cold and tenuous on scales of parsecs. As such, our understanding of such a phenomenon can truly increase by combining theoretical and numerical studies adopting different numerical techniques to face different problems and deal with diverse conditions. In this review, we will describe the tremendous advancement in our comprehension of the bursts phenomenology through numerical modeling. Though we will discuss studies mainly based on jet dynamics across the progenitor star and the interstellar medium, we will also touch upon other problems such as the jet launching, its acceleration, and the radiation mechanisms. Finally, we will describe how combining numerical results with observations from Swift and other instruments resulted in true understanding of the bursts phenomenon and the challenges still lying ahead.