Astrophysical insights into magnetic Penrose process around parameterized Konoplya–Rezzolla–Zhidenko black hole

Tursunali Xamidov; Sanjar Shaymatov; Pankaj Sheoran; Bobomurat Ahmedov

doi:10.1140/epjc/s10052-024-13658-w

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 1300
https://doi.org/10.1140/epjc/s10052-024-13658-w

Regular Article - Theoretical Physics

Astrophysical insights into magnetic Penrose process around parameterized Konoplya–Rezzolla–Zhidenko black hole

Tursunali Xamidov¹, Sanjar Shaymatov¹^,2^,3^,4, Pankaj Sheoran⁵^a and Bobomurat Ahmedov¹

¹ Institute of Fundamental and Applied Research, National Research University TIIAME, Kori Niyoziy 39, 100000, Tashkent, Uzbekistan
² Institute for Theoretical Physics and Cosmology, Zhejiang University of Technology, 310023, Hangzhou, China
³ University of Tashkent for Applied Sciences, Str. Gavhar 1, 100149, Tashkent, Uzbekistan
⁴ Western Caspian University, AZ1001, Baku, Azerbaijan
⁵ Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Tiruvalam Rd, Katpadi, 632014, Vellore, Tamil Nadu, India

^a pankaj.sheoran@vit.ac.in

Received: 17 August 2024
Accepted: 27 November 2024
Published online: 20 December 2024

Abstract

In this study, we investigate the parameterized Konoplya–Rezzolla–Zhidenko (KRZ) black hole (BH) spacetime in the presence of an external asymptotically uniform magnetic field. We first examine the innermost stable circular orbit (ISCO) radii for both neutral and charged test particles, demonstrating that the deformation parameters, $δ_{1}$ $\delta _1$ and $δ_{2}$ $\delta _2$ , reduce the ISCO values. Subsequently, we assess the energy efficiency of the magnetic Penrose process (MPP) for an axially symmetric parameterized BH, analyzing the effects of the deformation parameters and the magnetic field on the energy extraction process. Our findings indicate that the rotational deformation parameter $δ_{2}$ $\delta _2$ is crucial for the efficiency of energy extraction from the BH. The synergy between the rotational deformation parameter and the magnetic field significantly boosts the energy extraction efficiency, with values exceeding $100 %$ $100\%$ . Interestingly, for extremal BHs with negative $δ_{2}$ $\delta _2$ values, the energy efficiency increases, in contrast to Kerr BHs where the MPP effect diminishes. Additionally, we explore the astrophysical implications of the MPP by deriving the maximum energy of a proton escaping from the KRZ parameterized BH due to the beta decay of a free neutron near the horizon. Our results show that negative $δ_{2}$ $\delta _2$ values require stronger magnetic fields to achieve equivalent energy levels for high-energy protons, providing deeper insights into high-energy astrophysical phenomena around the parameterized BH.

© The Author(s) 2024

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