Energy extraction from a Reissner-Nordström–de Sitter black hole

Baez, A.; Breton, Nora; Cabrera-Munguia, I.

doi:10.1103/physrevd.110.064065

Phys. Rev. D

2024

DOI: 10.1103/physrevd.110.064065

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Energy extraction from a Reissner-Nordström–de Sitter black hole

A. Baez,

Nora Breton,

I. Cabrera-Munguia

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2024

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Cited by 2 publications

References 33 publications

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Novel topological phenomena of timelike circular orbits for charged test particles

Ye,

Wei

2024

Class. Quantum Grav.

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The topological approach has recently been successfully employed to investigate timelike circular orbits for massive neutral test particles in the black hole backgrounds. The observed vanishing topological number implies that these timelike circular orbits occur in pairs. However, the behavior of charged test particles in this regard remains unexplored. To address this issue, our study focuses on examining the inﬂuence of particle charge on the topology of timelike circular orbits within a spherically symmetrical black hole spacetime holding a nonvanishing radial electric ﬁeld. We consider four distinct cases based on the charges of the particle and the black hole: unlike strong charge, unlike weak charge, like weak charge, and like strong charge. For each case, we calculate the corresponding topological number. Our results reveal that when the charge is large enough, the topological number takes a value of -1 instead of 0, which diﬀers from the neutral particle scenario. Consequently, in cases of small charges, the timelike circular orbits appear in pairs, whereas in cases of larger charges, an additional unstable timelike circular orbit emerges. These ﬁndings shed light on the inﬂuence of the particle charge on the topological properties and number of timelike circular orbits.

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Novel topological phenomena of timelike circular orbits for charged test particles

Ye,

Wei

2024

Class. Quantum Grav.

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Electric Penrose process and the accretion disk around a 4D-charged Einstein-Gauss-Bonnet black hole

Alloqulov,

Shaymatov

2024

Eur. Phys. J. Plus

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Energy extraction from a Reissner-Nordström–de Sitter black hole

Cited by 2 publications

References 33 publications

Novel topological phenomena of timelike circular orbits for charged test particles

Novel topological phenomena of timelike circular orbits for charged test particles

Electric Penrose process and the accretion disk around a 4D-charged Einstein-Gauss-Bonnet black hole

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