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Instability of twisted magnetar magnetospheres

TLDR
In this paper, the authors acknowledge the support from the grants AYA2015-66899-C2-1P and PROMETEO-II-2014-069.
Abstract
We acknowledge the support from the grants AYA2015-66899-C2-1-P and PROMETEO-II-2014-069. JM acknowledges a Ph.D. grant of the Studienstiftung des Deutschen Volkes. PC acknowledges the Ramon y Cajal funding (RYC-2015-19074) supporting his research. We acknowledge the partial support of the PHAROS COST Action CA16214 and GWverse COST Action CA16104.

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Journal ArticleDOI

Striped Blandford/Znajek jets from advection of small-scale magnetic field

TL;DR: In this paper, the authors numerically quantify the unsteady outgoing Poynting flux through the horizon of a rapidly spinning black hole endowed with a rotating accretion disc.
Journal ArticleDOI

Computational General Relativistic Force-Free Electrodynamics: II. Characterization of Numerical Diffusivity

TL;DR: In this article, the authors evaluate the limits of general relativistic force-free electrodynamics in the context of current sheets and tearing mode instabilities, and find that at least eight numerical cells per characteristic size of interest are needed to find consistency between resistivity of numerical and of physical origins.
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Tangled magnetic field model of QPOs

TL;DR: In this article, the authors explore if torsional modes excited in the stellar interior and magnetosphere can explain the quasi-periodic oscillations (QPOs) observed in the tail of the giant flare of SGR 1900+14.
Journal ArticleDOI

Computational general relativistic force-free electrodynamics - I. Multi-coordinate implementation and testing

TL;DR: In this article, the authors present numerical strategies capable of modeling fully dynamical force-free magnetospheres of compact astrophysical objects, such as BHs and neutron stars.
Journal ArticleDOI

Nonaxisymmetric Precession of Magnetars and Fast Radio Bursts

TL;DR: In this article , the authors consider the constraints on internal magnetic fields and geometry if the cyclical behavior observed for FRB~180916.J0158 and FRB 121102 is due to precession of magnetars.
References
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Book

General Relativity

Robert Wald
Journal ArticleDOI

Gamma-ray bursters at cosmological distances

TL;DR: It has been shown that gamma-ray bursters are at cosmological distances, like quasars, with a redshift of about 1 or 2 as discussed by the authors, making them the brightest objects known in the universe.
Journal ArticleDOI

Hyperbolic divergence cleaning for the MHD equations

TL;DR: A new approach to the stabilization of numerical schemes in magnetohydrodynamic processes in which the divergence errors are transported to the domain boundaries with the maximal admissible speed and are damped at the same time is developed.
Journal ArticleDOI

An Energy Principle for Hydromagnetic Stability Problems

TL;DR: In this paper, the stability of static, highly conducting, fully ionized plasmas is investigated by means of an energy principle developed from one introduced by Lundquist, and the derivation of the principle and the conditions under which it applies are given.
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