Magnetic acceleration of relativistic jets

TL;DR

This paper reviews recent advances in magnetic acceleration mechanisms for relativistic jets, emphasizing the standard model's limitations and exploring alternative theories through simplified physical arguments.

Contribution

It critically examines the standard axisymmetric ideal MHD model and discusses potential alternative models for magnetic acceleration of relativistic jets.

Findings

Standard model is overly restrictive

Alternative models may better explain jet acceleration

Simplified calculations clarify complex theory

Abstract

This is a brief review of the recent developments in the theory of magnetic acceleration of relativistic jets. We attempt to explain the key results of this complex theory using basic physical arguments and simple calculations. The main focus is on the standard model, which describes steady-state axisymmetric ideal MHD flows. We argue that this model is over-restrictive and discuss various alternatives.