Five-dimensional charged rotating minimally gauged supergravity black hole cannot be over-spun and/or over-charged in non-linear accretion

Shaymatov, Sanjar; Dadhich, Naresh; Ahmedov, Bobomurat; Jamil, Mubasher

doi:10.1140/epjc/s10052-020-8009-4

Cited by 37 publications

(22 citation statements)

References 60 publications

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“…In past several decades, based on Wald's gedanken experiment, many significant works have been done to check this conjecture. Some of them have indeed proved its validity under certain conditions [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], while the others attempt to present its violations [22][23][24][25][26]. Besides, other various possible examples to violate cosmic censorship are also proposed.…”

Section: Introductionmentioning

confidence: 98%

Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio

Song

Wang

2021

J. High Energ. Phys.

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We study the model of four-dimensional Einstein-Maxwell-Λ theory minimally coupled to a massive charged self-interacting scalar field, parameterized by the quartic and hexic couplings, labelled by λ and β, respectively. In the absence of scalar field, there is a class of counterexamples to cosmic censorship. Moreover, we investigate the full nonlinear solution with nonzero scalar field included, and argue that these counterexamples can be removed by assuming charged self-interacting scalar field with sufficiently large charge not lower than a certain bound. In particular, this bound on charge required to preserve cosmic censorship is no longer precisely the weak gravity bound for the free scalar theory. For the quartic coupling, for λ < 0 the bound is below the one for the free scalar fields, whereas for λ > 0 it is above. Meanwhile, for the hexic coupling the bound is always above the one for the free scalar fields, irrespective of the sign of β.

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Section: Introductionmentioning

confidence: 98%

Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio

Song

Wang

2021

J. High Energ. Phys.

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“…In spite of the fact that the Kerr-Newman black hole has no exact solution of the Einstein-Maxwell equation for an analogue of a five dimensional Kerr-Newman black hole this issue can be fixed by considering the minimally gauged supergravity charged rotating black hole in five dimensions [57]. It is shown that when one goes to a five dimensional charged rotating black hole with single rotation, it could be over-extremalized in the case when the charge parameter dominates over rotation while it cannot do so when the opposite is the case [58]. It is worth noting that the study of overspinning of an extremal black hole in higher dimensions shows that neither an extremal black hole could be overspun nor a non-extremal one could be converted into an extremal one under a linear order perturbation [24].…”

Section: Introductionmentioning

confidence: 99%

Testing the weak cosmic censorship conjecture for a Reissner–Nordström–de Sitter black hole surrounded by perfect fluid dark matter

2021

Self Cite

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In this paper, we test the weak cosmic censorship conjecture (WCCC) for the Reissner–Nordström–de Sitter (RN-dS) black hole surrounded by perfect fluid dark matter. We consider a spherically symmetric perturbation on deriving linear and non-linear order perturbation inequalities by applying a new version of gedanken experiments well accepted from the work of Sorce and Wald. Contrary to the well-known result that the Reissner–Nordström (RN) black hole could be overcharged under linear order particle accretion it is hereby shown that the same black hole in perfect fluid dark matter with cosmological parameter cannot be overcharged. Considering a realistic scenario in which black holes cannot be considered to be in vacuum we investigate the contribution of dark matter and cosmological constant in the overcharging process of an electrically charged black hole. We demonstrate that the black hole can be overcharged only when two fields induced by dark matter and cosmological parameter are completely balanced. Further we present a remarkable result that a black hole cannot be overcharged beyond a certain threshold limit for which the effect arising from the cosmological constant dominates over the effect by the perfect fluid dark matter. Thus even for a linear accretion process, the black hole cannot always be overcharged and hence obeys the WCCC in general. This result would continue to be fulfilled for non-linear order accretion.

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“…Following Wald various thought experiments were constructed to test the validity of cosmic censorship. These thought experiments involve perturbations of the black holes with both test particles [4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24], and fields [25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43]. There were also attempts to incorporate quantum effects [44,45,46,47,48,49,50], and test the validity of cosmic censorship for asymptotically anti-de Sitter cases [51,52,…”

Section: Introductionmentioning

confidence: 99%

Cosmic censorship, massless fermionic test fields, and absorption probabilities

Düztaş

2021

Preprint

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In the conventional approach, fermionic test fields lead to a generic overspinning of black holes resulting in the formation of naked singularities. The absorption of the fermionic test fields with arbitrarily low frequencies is allowed for which the contribution to the angular momentum parameter of the spacetime diverges. Recently we have suggested a more subtle treatment of the problem considering the fact that only the fraction of the test fields that is absorbed by the black hole contributes to the space-time parameters. Here, we re-consider the interaction of massless spin (1/2) fields with Kerr and Kerr-Newman black holes, adapting this new approach. We show that the drastic divergence problem disappears when one incorporates the absorption probabilities. Still, there exists a range of parameters for the test fields that can lead to overspinning. We employ backreaction effects due to the self-energy of the test fields which fixes the overspinning problem for fields with relatively large amplitudes, and renders it non-generic for smaller amplitudes. This non-generic overspinning appears likely to be fixed by alternative semi-classical and quantum effects.

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Five-dimensional charged rotating minimally gauged supergravity black hole cannot be over-spun and/or over-charged in non-linear accretion

Cited by 37 publications

References 60 publications

Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio

Weak cosmic censorship with self-interacting scalar and bound on charge to mass ratio

Testing the weak cosmic censorship conjecture for a Reissner–Nordström–de Sitter black hole surrounded by perfect fluid dark matter

Cosmic censorship, massless fermionic test fields, and absorption probabilities

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