11 papers · 1 filter
Extracting Energy from a Non-Kerr Rotating Spacetime with an Anomalous Quadrupole Moment via Magnetic Reconnection
Ke Wang, Xiao-Xiong Zeng
This paper investigates how to extract energy from a non-Kerr rotating spacetime with an anomalous quadrupole moment via the magnetic reconnection mechanism. Unlike many other rota…
Particle decay and energy conservation in the Kerr-Newman black hole
Bing-Bing Chen, Guo-Ping Li, Ke Wang +1
In this paper, we study the decay of a particle in Kerr--Newman spacetime. Both theoretical analysis and numerical simulations show that when a particle splits in Kerr--Newman spac…
Shadows and Polarization Images of a Four-dimensional Gauss-Bonnet Black Hole Irradiated by a Thick Accretion Disk
Xiao-Xiong Zeng, Huan Ye, Muhammad Israr Aslam +1
We adopt a general relativistic ray-tracing approach to study the shadows and polarization images of spherically symmetric Gauss-Bonnet (GB) black holes enveloped by geometrically…
Repetitive Penrose Process in Accelerating Kerr Black Holes
Xiao-Xiong Zeng, Ke Wang
This paper investigates the repetitive Penrose process in accelerating Kerr black holes and explores the influence of the acceleration factor on the repetitive Penrose process. Aft…
Hotspot Images from Magnetic Reconnection Processes in the plunging Region of a Kerr Black Hole
Xiao-Xiong Zeng, Yun Hong, Ke Wang
Employing the hotspot imaging technique, this work investigates the plasma motion trajectories prior to and following the Comisso-Asenjo mechanism within the plunging region. After…
Repetitive Penrose process in Kerr-de Sitter black holes
Ke Wang, Xiao-Xiong Zeng
Recently, references [1,2] found that the repetitive Penrose process cannot extract all the extractable rotational energy of a Kerr black hole, and reference [3] found that the rep…
Hotspot Image Driven by Magnetic Reconnection in Kerr-anti-de Sitter Black Holes
Xiao-Xiong Zeng, Ke Wang
Based on the Comisso-Asenjo mechanism, we investigate the kinematic images of plasma before and after magnetic reconnection in Kerr-Anti-de Sitter(Kerr-AdS) black holes. Following…
Hotspot Images Driven by Magnetic Reconnection in Kerr-Sen black hole
Ke Wang, Xiao-Xiong Zeng
In the Kerr-Sen black hole, this study investigates the changes in hotspot images before and after the occurrence of magnetic reconnection. After reviewing the Comisso-Asenjo magne…
Energy extraction from the accelerating Kerr black hole via magnetic reconnection in the plunging region and circular orbit region
Ke Wang, Xiao-Xiong Zeng
Based on the magnetic reconnection mechanism, this study investigates how to extract energy effectively from an accelerating Kerr black hole in the plunging region and circular orb…
Energy Extraction From the Kerr-Bertotti-Robinson Black Hole via Magnetic Reconnection under Circular Plasma and Plunging Plasma
Xiao-Xiong Zeng, Ke Wang
Recently, a class of exact solutions describing rotating black holes immersed in a uniform magnetic field has been proposed, and various properties of such black holes remain uncle…
Energy Extraction via Magnetic Reconnection in Kerr-Sen-AdS Black Hole: Circular Plasma and Plunging Plasma
Xiao-Xiong Zeng, Ke Wang
In this paper, we investigate the power and efficiency of energy extraction through magnetic reconnection in the Kerr-Sen-AdS black hole, with a primary focus on both the cir…