Joule–Thomson expansion of RN-AdS black hole immersed in perfect fluid dark matter

Cao, Yihe; Feng, Hanwen; Hong, Wei; Tao, Jun

doi:10.1088/1572-9494/ac1066

Cited by 13 publications

(3 citation statements)

References 68 publications

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“…The reason, as explained in [1121], is that the Kiselev metric does not describe a space-time surrounded by a perfect fluid in the sense we are using here: in fact, it is easy to show that the energy-momentum tensor sourcing the Kiselev metric inevitably possesses shear stress components, and therefore cannot describe a perfect fluid [1121]. This is not the case, instead, for the space-time described by equation (117), which has been explicitly derived by starting from a perfect fluid source term (see [1122][1123][1124][1125][1126][1127][1128][1129][1130][1131][1132][1133][1134][1135][1136][1137][1138][1139][1140][1141] for other relevant works).…”

Section: Black Hole Surrounded By Perfect Fluid Dark Mattermentioning

confidence: 96%

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗

Vagnozzi

Roy

Tsai

et al. 2023

Class. Quantum Grav.

210

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Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. We consider a wide range of well-motivated deviations from classical General Relativity (GR) BH solutions, and constrain them using the Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A*), connecting the size of the bright ring of emission to that of the underlying BH shadow and exploiting high-precision measurements of Sgr A*’s mass-to-distance ratio. The scenarios we consider, and whose fundamental parameters we constrain, include various regular BHs, string-inspired space-times, violations of the no-hair theorem driven by additional fields, alternative theories of gravity, novel fundamental physics frameworks, and BH mimickers including well-motivated wormhole and naked singularity space-times. We demonstrate that the EHT image of Sgr A* places particularly stringent constraints on models predicting a shadow size larger than that of a Schwarzschild BH of a given mass, with the resulting limits in some cases surpassing cosmological ones. Our results are among the first tests of fundamental physics from the shadow of Sgr A* and, while the latter appears to be in excellent agreement with the predictions of GR, we have shown that a number of well-motivated alternative scenarios, including BH mimickers, are far from being ruled out at present.

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Section: Black Hole Surrounded By Perfect Fluid Dark Mattermentioning

confidence: 96%

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗

Vagnozzi

Roy

Tsai

et al. 2023

Class. Quantum Grav.

210

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show abstract

“…In another study, the Joule‐Thomson expansion of Reissner‐Nordström‐anti‐de Sitter black hole immersed in the perfect fluid dark matter has been studied recently. [ 21 ] This study was done in GR, and it shows that the surrounding dark matter fluid has noticeable impacts on black hole thermodynamics as well as the Joule‐Thomson expansion of the black hole. In presence of a cloud of string and quintessence, the Joule‐Thomson expansion of a charged anti‐de Sitter black hole in GR has been studied in Ref.…”

Section: Introductionmentioning

confidence: 99%

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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“…Therefore, studying and analyzing the effects of JCAP12(2023)005 dark matter halo on supermassive black holes in the galaxy center are of great significance. Recently, a number of works have been emerged to study the dark matter effects on black hole behaviors, such as the circular geodesics [24,25], black hole shadow [26][27][28][29][30][31][32][33][34][35], gravitational lensing [36][37][38][39][40][41][42][43], accretion disk [44], thermodynamics [45][46][47], quasi-normal mode [48,49], black hole echoes [50] and black hole merging process [51].…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing of Schwarzschild and charged black holes immersed in perfect fluid dark matter halo

Qiao,

Zhou

2023

J. Cosmol. Astropart. Phys.

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Dark matter and dark energy dominate the behavior of our universe. The dark matter usually forms halo structures in large number of galaxies. Properties of dark matter halo can be revealed and understood from the gravitational lensing observations. In this work, a comprehensive study on the gravitational lensing of black holes immersed in dark matter halos is presented. To effectively model the supermassive black hole in a galaxy center (which is surrounded by dark matter halo) in a simple way, we investigate the Schwarzschild black hole and charged Reissner-Nordström black hole immersed in a perfect fluid dark matter halo. In the present work, several basic quantities in gravitational lensing (the gravitational deflection angle of light, photon sphere, black hole shadow radius, gravitational lens equation and Einstein ring) are calculated and analyzed analytically and numerically. A second order analytical expansion of gravitational deflection angle is obtained in the weak deflection limit, and the full gravitational deflection angle (including all order perturbation contributions applicable to both weak and strong deflection limits) is also calculated numerically as comparisons. It enables us to analyze the perfect fluid dark matter influences on gravitational deflection angle and gravitational lensing beyond the leading order, which were not sufficiently studied in previous works. Assuming M ∼ λDM ∼ Q, our results show that dark matter can greatly influence the gravitational lensing of central black holes.

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Joule–Thomson expansion of RN-AdS black hole immersed in perfect fluid dark matter

Cited by 13 publications

References 68 publications

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗

Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A ∗

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

Gravitational lensing of Schwarzschild and charged black holes immersed in perfect fluid dark matter halo

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