English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Force-Free Electrodynamics (FFE) describes a particular regime ofmagnetically dominated relativistic plasmas, which arises on severalastrophysical scenarios of interest such as pulsars or active galactic nuclei.In this article, we present a full 3D numerical implementation of the FFEevolution around a Kerr black hole. The novelty of our approach isthree-folded: i) We use the "multi-block" technique to represent a domain with$S^2 \times \mathbb{R}^{+}$ topology within a stable finite-differences scheme.ii) We employ as evolution equations those arising from a covarianthyperbolization of the FFE system. iii) We implement stable andconstraint-preserving boundary conditions to represent an outer region given bya uniform magnetic field aligned or misaligned respect to the symmetry axis.  We find stationary jet solutions which reach equilibrium --through boundaryconditions-- with the outer numerical surface. This is so, even when the outerboundary is located very close to the central region (i.e. $r_{out}\sim 10M $).These numerical solutions reproduce most of the known results for analogueastrophysical settings.

A novel scheme for simulating the force-free equations: boundary conditions and the evolution of solutions towards stationarity