Enhanced Blandford Znajek Jet in Loop Quantum Black Hole
Journal of Cosmology and Astroparticle Physics(2024)
摘要
The Blandford-Znajek (BZ) process powers energetic jets by extracting the
rotating energy of a Kerr black hole. It is important to understand this
process in non-Kerr black hole spacetimes. In this study, we conduct
two-dimensional and three-dimensional two-temperature General Relativistic
Magnetohydrodynamic (GRMHD) simulations of magnetized accretion flows onto a
rotating Loop-Quantum black hole (LQBH). Our investigation focuses on the
accretion flow structure and jet launching dynamics from our simulations. We
observe that the loop quantum effects increase the black hole angular frequency
for spinning black holes.This phenomenon intensifies the frame-dragging effect,
leading to an amplification of the toroidal magnetic field within the funnel
region and enhancement of the launching jet power. It is possible to fit the
jet power following a similar fitting formula of the black hole angular
frequency as seen in the Kerr black hole. Based on the General Relativistic
Radiation Transfer (GRRT) calculation, we find that the jet image from LQBH has
a wider opening angle and an extended structure than the Kerr BH.
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