Quasinormal modes of black holes with non-linear-electrodynamic sources in Rastall gravity

Gogoi, Dhruba Jyoti; Goswami, Umananda Dev

doi:10.1016/j.dark.2021.100860

Cited by 41 publications

(31 citation statements)

References 57 publications

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“…Mashhoon method is an analytical method of calculating the QNMs of a black hole by comparing its effective potential with a standard potential, such as the Poschl-Teller potential [18] or the Eckart potential [11]. Starting from the metric function f (r), the effective black hole potential can be obtained from the formula [16,23]:…”

Section: A Qnms By Mashhoon Methodsmentioning

confidence: 99%

“…It is a semi-analytical approximation method. The basics of the WKB method can be found extensively in literature ( [2,3,16] and references therein). Here our basic intention is to make a comparative analysis of the QNM frequencies obtained by the Mashhoon method with that will be given by the WKB method.…”

Section: B Qnms By Wkb Methodsmentioning

confidence: 99%

“…However, from Table V it is seen that some of the above observations are not applicable to the case for n = 1 and the difference between the Mashhoon method and the WKB method in this case is almost ten times higher than that for the n = 0 case. This may be due to the fact that the usual WKB method can only be reliably used to calculate QNMs for the situation with n < l [2,16].…”

Section: B Qnms By Wkb Methodsmentioning

confidence: 99%

“…Quasinormal Modes (QNMs) are some complex frequencies associated with the GWs that represent the reaction of a black hole, after some perturbations act on it [2,3,[11][12][13][14][15][16][17]. There are different methods of calculations of QNMs from the black holes [2].…”

Section: Introductionmentioning

confidence: 99%

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Quasinormal modes and thermodynamic properties of GUP-corrected Schwarzschild black hole surrounded by quintessence

Karmakar¹,

Gogoi²,

Goswami³

2022

Preprint

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We study the Quasinormal Modes (QNMs) of the Schwarzschild black hole surrounded by a quintessence field after implementing the quantum corrections to its solution as required by the Generalized Uncertainty Principle (GUP). We analyze the dependence of the QNMs on the deformation parameters of GUP as well as on the quintessence parameter. For better accuracy, we compare the results of the QNMs obtained via Mashhoon method with the semi-analytical WKB method. Further, we study the thermodynamic properties of the GUPcorrected Schwarzschild black hole and check for any dependence with the deformation parameters and the quintessence parameter. In particular, we compute the Hawking temperature, heat capacity and entropy for the black hole and analyze the results graphically to show the dependency of the thermodynamic properties on the deformation parameters as well as the quintessence parameter. Black hole remnant has been studied and it is shown that the possible existence of remnant radius as well as remnant temperature depends on the deformations introduced. However, it is observed that the GUP-corrected black hole constructed here can not become a remnant. Black hole shadow has been investigated and it was found that the shadow has linear relations with the model parameters. We conclude the work with a summary note and future possibilities.

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Section: A Qnms By Mashhoon Methodsmentioning

confidence: 99%

Section: B Qnms By Wkb Methodsmentioning

confidence: 99%

Section: B Qnms By Wkb Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quasinormal modes and thermodynamic properties of GUP-corrected Schwarzschild black hole surrounded by quintessence

Karmakar¹,

Gogoi²,

Goswami³

2022

Preprint

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“…In search of constructing a Lagrangian formulation of RG, the authors of [46] have found that some modified theories of gravity can result in RG in some particular cases. Other investigations have been performed in [79][80][81][82][83][84][85].…”

Section: Introductionmentioning

confidence: 99%

A dynamical system representation of generalized Rastall gravity

Shabani,

Moradpour,

Ziaie

2022

Preprint

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In this work we study the phase-space analysis of generalized Rastall gravity (GRG) which has recently been introduced as a modification to the original version of Rastall gravity (RG). In GRG, the coupling parameter assumes a dynamical feature and may play the role of dark energy (DE) which is responsible for the present accelerating expansion of the Universe. Our investigation shows that such a modification of General Relativity (GR) admits a stable critical point corresponding to the late time accelerated expansion of the Universe. Assuming both dark matter (DM) and an ultra-relativistic perfect fluid (radiation) as the cosmic ingredients, we find that the underlying model presents a viable sequence of cosmic evolution, beginning from radiation dominated era passing then through DM domination and finally reaches the late time DE dominated era. Moreover, taking into account the contribution due to the spatial curvature within the total energy density leads to a growing mode for it in such a way that its present values are consistent with those reported in recent observations. We also present a numerical simulation of the model which particularizes our dynamical system representation. These studies demonstrate the ability of GRG to describe the present accelerated expansion of the Universe.

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Joule‐Thomson Expansion and Optical Behaviour of Reissner‐Nordström‐Anti‐de Sitter Black Holes in Rastall Gravity Surrounded by a Quintessence Field

Gogoi

Sekhmani

Kalita

et al. 2023

Fortschritte der Physik

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This paper deals with the thermodynamics, Joule‐Thomson expansion and optical behaviour of a Reissner‐Nordström‐anti‐de Sitter black hole in Rastall gravity surrounded by a quintessence field. The black hole solution obtained in this framework is different from a corresponding black hole in General Relativity. The black hole metric function, as well as the Hawking temperature, is affected by the presence of energy‐momentum conservation violation. The presence of energy‐momentum conservation violation also affects the isenthalpic and inversion temperature curves, and with an increase in the Rastall parameter, the inversion temperature rises slowly. The impacts of other parameters, such as charge, structural constant etc., are investigated and compared. The black hole shadow, as well as the energy emission rate of the black hole, decreases with an increase in the Rastall parameter. Hence, the black holes evaporate slowly in presence of energy‐momentum conservation violation.

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Quasinormal modes of black holes with non-linear-electrodynamic sources in Rastall gravity

Cited by 41 publications

References 57 publications

Quasinormal modes and thermodynamic properties of GUP-corrected Schwarzschild black hole surrounded by quintessence

Quasinormal modes and thermodynamic properties of GUP-corrected Schwarzschild black hole surrounded by quintessence

A dynamical system representation of generalized Rastall gravity

Joule‐Thomson Expansion and Optical Behaviour of Reissner‐Nordström‐Anti‐de Sitter Black Holes in Rastall Gravity Surrounded by a Quintessence Field

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