Charged 4D Einstein-Gauss-Bonnet-AdS black holes: Shadow, energy emission, deflection angle and heat engine

Panah, B. Eslam; Jafarzade, Kh.; Hendi, S. H.

doi:10.1016/j.nuclphysb.2020.115269

Cited by 96 publications

(28 citation statements)

References 77 publications

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“…It is clear that as both the electric charge and the GB coupling constant increase, the photon sphere radius becomes smaller. These results agree with those reported in [43,61].…”

Section: B the Photon Sphere Radius For A Cegb Bhsupporting

confidence: 94%

“…It also ilustrates the effetcs of the electric charge of the BH and the GB coupling constant on the shadow radius of a CEGB BH. As both parameters increase, the shadow radius decreases, which agrees with previous studies [30,43,46,61]. This implies that, based on the range of possible values for the BH geometric parameters as stated in equation ( 9), the CEGB BH has a smaller shadow radius compared to the EGB 4D BH and the RN BH, and these BHs have a smaller shadow radius than that of a Schwarzschild BH Figure ( 5) also show that the curves overlap for small values of α and Q and then, in this region the CEGB BH shadow radius obtained from Churilova's eikonal approach is very useful due to its analytical simplicity, providing accurate results.…”

Section: B Cegb Bh Shadow Radiussupporting

confidence: 92%

“…Actually, this research trend has been given in mostly general solutions. For example, a recent publication delved into the properties of rotating charged BHs in in EGB 4D gravity, such as the examination of photon motion and its shadow [42], an analysis was also made of the characteristics of charged EGB 4D BH in anti-de Sitter space, including their shadow, energy emission, deflection angle, and heat engine properties [43], as well as the investigations of the instability, QNMs and strong cosmic censorship of charged EGB 4D BH in de Sitter space under charged scalar and electromagnetic perturbations in [44,45]. Notably, by merging the findings from previous investigations, a more comprehensive understanding of these variations in modified theories of gravity can be achieved.…”

Section: Introductionmentioning

confidence: 99%

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Eikonal quasinormal modes, photon sphere and shadow of a charged black hole in the 4D Einstein-Gauss-Bonnet gravity

Ladino¹,

Larrañaga²

2023

Preprint

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In this work, we investigate the relationship between the geometrical properties, the photon sphere, the shadow, and the eikonal quasinormal modes of electrically charged black holes in 4D Einstein-Gauss-Bonnet gravity. Quasinormal modes are complex frequency oscillations that are dependent on the geometry of spacetime and have significant applications in studying black hole properties and testing alternative theories of gravity. Here, we focus on the eikonal limit for high frequency quasinormal modes and their connection to the black holes geometric characteristics. To study the photon sphere, quasinormal modes, and black hole shadow, we employ various techniques such as the WKB method in various orders of approximation, the Poschl-Teller potential method, and Churilova's analytical formulas. Our results indicate that the real part of the eikonal quasinormal mode frequencies of test fields are linked to the unstable circular null geodesic and are correlated with the shadow radius for an Charged Einstein-Gauss-Bonnet 4D black hole. Furthermore, we found that the real part of quasinormal modes, the photon sphere and shadow radius have a lower value for charged black holes in 4D Einstein-Gauss-Bonnet gravity compared to black holes without electric charge and those of static black holes in general relativity. Additionally, we explore various analytical formulas for the photon spheres and shadows, deducing an Churilova's approximate formula for the black hole shadow radius of the Charged Einstein-Gauss-Bonnet 4D black hole, which arises from its connection with the eikonal quasinormal modes.

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“…It is clear that as both the electric charge and the GB coupling constant increase, the photon sphere radius becomes smaller. These results agree with those reported in [43,61].…”

Section: B the Photon Sphere Radius For A Cegb Bhsupporting

confidence: 94%

Section: B Cegb Bh Shadow Radiussupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Eikonal quasinormal modes, photon sphere and shadow of a charged black hole in the 4D Einstein-Gauss-Bonnet gravity

Ladino¹,

Larrañaga²

2023

Preprint

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“…Interestingly, the solution of the same form has been presented in the conformal anomaly inspired gravity [40,41]. Along this line, the Einstein-Gauss-Bonnet gravity in the 4D spacetime has been explored extensively on various aspects, including the exact solutions [42][43][44][45][46][47][48][49][50][51][52][53][54][55], the quasinormal modes and stability [56][57][58][59][60][61][62][63][64][65][66][67], the observable shadows [68][69][70][71][72][73], the geodesics and gravitational lensing [74][75][76][77][78], and the thermodynamics and cosmic censorship conjecture [79][80][81][82][83][84][85][86].…”

Section: Jhep12(2020)192mentioning

confidence: 99%

Holographic superconductors in 4D Einstein-Gauss-Bonnet gravity

Qiao

Ouyang

Wang

et al. 2020

J. High Energ. Phys.

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We investigate the neutral AdS black-hole solution in the consistent D → 4 Einstein-Gauss-Bonnet gravity proposed in [K. Aoki, M.A. Gorji, and S. Mukohyama, Phys. Lett. B810 (2020) 135843] and construct the gravity duals of (2 + 1)-dimensional superconductors with Gauss-Bonnet corrections in the probe limit. We find that the curvature correction has a more subtle effect on the scalar condensates in the s-wave superconductor in (2 + 1)-dimensions, which is different from the finding in the higher-dimensional superconductors that the higher curvature correction makes the scalar hair more difficult to be developed in the full parameter space. However, in the p-wave case, we observe that the higher curvature correction always makes it harder for the vector condensates to form in various dimensions. Moreover, we note that the higher curvature correction results in the larger deviation from the expected relation in the gap frequency ωg/Tc ≈ 8 in both (2 + 1)-dimensional s-wave and p-wave models.

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“…The EGB gravity admits two maximally symmetric vacuum solutions as the Einstein vacuum in α → 0, and the Gauss-Bonnet vacuum in α = 0 [19,20]. Previous studies [21] including the effect of varying the cosmological constant, showed that the correspondence between ordinary thermodynamic systems and black hole mechanics would be completed to include a variable cosmological constant. The bubble nucleation probability depends on the curvature coupling of the Higgs fields, which is a renormalizable parameter of the Standard Model (SM) in curved spacetime [22].…”

Section: Introductionmentioning

confidence: 99%

Compressibility of the Quark Stars in Einstein-Gauss-Bonnet Gravity

Bousder¹

2023

Redefining Standard Model Particle Physics [Working Title]

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To study the behavior of some of the quark stars (QSs) in the Einstein-Gauss-Bonnet gravity, we develop analytically the equation of state (EoS). We show that the Gauss-Bonnet coupling affects the star compressibility. This last relates the radial pressure with the thermodynamic volume and analyzes their behavior through the quark stars. We have found that the TOV equation is well behaved as the van der Waals equation. We discuss the characteristics of the radial and tangential compressibility in the surface and inside the star. We have determined the thickness of the region that contains the quarks in the QS. We show that the quark fluid exists in the region between the Schwarzschild radius and the radius of stars. We study the stability under radial and tangential perturbations.

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Charged 4D Einstein-Gauss-Bonnet-AdS black holes: Shadow, energy emission, deflection angle and heat engine

Cited by 96 publications

References 77 publications

Eikonal quasinormal modes, photon sphere and shadow of a charged black hole in the 4D Einstein-Gauss-Bonnet gravity

Eikonal quasinormal modes, photon sphere and shadow of a charged black hole in the 4D Einstein-Gauss-Bonnet gravity

Holographic superconductors in 4D Einstein-Gauss-Bonnet gravity

Compressibility of the Quark Stars in Einstein-Gauss-Bonnet Gravity

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