Energy Extraction from Rotating Charged Black Holes in Kalb-Ramond Gravity

TL;DR

This paper investigates how energy can be extracted from rotating charged black holes within Kalb-Ramond gravity using magnetic reconnection, highlighting the impact of Lorentz-violating parameters on efficiency and potential for testing gravity theories.

Contribution

It introduces a detailed analysis of energy extraction mechanisms in KR gravity, emphasizing the influence of Lorentz-violating parameters on process efficiency and potential observational constraints.

Findings

Lorentz-violating parameter significantly affects energy extraction.

Energy extraction in the circular orbit region can constrain KR gravity.

Feasible energy extraction in the plunging region is less sensitive to KR parameters.

Abstract

This work presents a comprehensive study of energy extraction via the Comisso-Asenjo magnetic reconnection mechanism from rotating charged black holes in the context of Kalb-Ramond (KR) gravity. We systematically investigate the influence of various parameters on the energy extraction process, comparing the results in two distinct regions: the circular orbit region and the plunging region. {The results reveal that the Lorentz-violating parameter has a significant impact on energy extraction, affecting not only the parameter space where energy extraction is possible, but also the energy extraction power and efficiency.} It is found that the energy extraction process in the circular orbit region can offer a promising avenue for constraining KR gravity. In contrast, although energy extraction from the plunging region remains feasible even for black holes with relatively low spins and takes place nearer to the event horizon, its sensitivity to the Lorentz-violating parameter is significantly reduced. Overall, the Comisso-Asenjo magnetic reconnection mechanism can serve as a probe of the KR field, particularly through the energy extraction process in the circular orbit region.