Scaling of the Anomalous Boost in Relativistic Jet Boundary Layer

TL;DR

This paper explores the boundary layer dynamics of relativistic jets, revealing an anomalous boost mechanism through simulations and theoretical models, and deriving scaling laws for jet acceleration.

Contribution

It introduces a new understanding of the boost mechanism in relativistic jet boundary layers using combined simulation and theoretical approaches.

Findings

Identification of an anomalous boost in jet boundary layers

Derivation of scaling laws for maximum Lorentz factor

Verification of theoretical models with simulations

Abstract

We investigate the one-dimensional interaction of a relativistic jet and an external medium. Relativistic magnetohydrodynamic simulations show an anomalous boost of the jet fluid in the boundary layer, as previously reported. We describe the boost mechanism using an ideal relativistic fluid and magnetohydrodynamic theory. The kinetic model is also examined for further understanding. Simple scaling laws for the maximum Lorentz factor are derived, and verified by the simulations.