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arXiv · 2402.15050

Energy Extraction via Magnetic Reconnection in Konoplya-Rezzolla-Zhidenko Parametrized Black Holes

Shao-Jun Zhang
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Abstract

Recently, Comisso and Asenjo proposed a novel mechanism for harnessing energy from black holes through magnetic reconnection. Our study focuses on exploring the utilization of this mechanism on Konoplya-Rezzolla-Zhidenko (KRZ) parametrized black holes to assess the impact of deformation parameters on energy extraction. Among the various parameters, $\{δ_1, δ_2\}$ are identified as the most important factors affecting the physics under consideration. The influence of these two parameters on the ergoregion, circular geodesics in the equatorial plane, and energy extraction from the KRZ black holes through magnetic reconnection is carefully analyzed. Results indicate that deviations from the Kerr metric have a notable influence on the energy extraction process. Particularly, energy extraction is enhanced with more negative ${δ_1}$ or more positive ${δ_2}$ within the range constrained by current astronomical observations, resulting in significantly higher maximum power and efficiency compared to the Kerr model. Moreover, when ${δ_2}$ is sufficiently negative, extracting energy through this mechanism becomes increasingly challenging, necessitating an exceptionally high black hole spin.

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Shao-Jun Zhang. 2024-04-27. Energy Extraction via Magnetic Reconnection in Konoplya-Rezzolla-Zhidenko Parametrized Black Holes. https://doi.org/10.1103/physrevd.109.084066

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