Shadow cast by a rotating charged black hole in quintessential dark energy

Khan, Saeed Ullah; Ren, Jingli

doi:10.48550/arxiv.2006.11289

Cited by 4 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…al [54]. Interestingly, effects of the cosmological constant are indistinguishable to the effect of quintessence parameter on BH's shadow presented in our earlier work [38]. We have also shown that at different inclination angles observer observes disparate shapes of the BH shadow.…”

Section: Discussionsupporting

confidence: 65%

“…As a result, the exploration of BH's shadow would be a rewarding technique to understand the astrophysical BHs and to compare the general theory of relativity with modern theories [37]. Khan and Ren [38] deduced that shadow radius increases with the increase of quintessence parameter, while the charge and spin parameters result in distortion of the BH shadow. The shadow of braneworld BH is investigated under the influence of the brane parameter [39].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geodesics and optical properties of rotating black hole in Randall-Sundrum brane with a cosmological constant

Khan¹,

Ren²

2020

Preprint

Self Cite

View full text Add to dashboard Cite

The presence of tidal charge and a cosmological constant has considerable consequences on the spacetime geometry and its study is much important from the observational point of view. Henceforth, we investigate their effects on particle dynamics and the shadow cast by a Randall-Sundrum braneworld black hole with a cosmological constant. On studying the circular geodesics of timelike particles, we have acquired the expressions of energy, angular momentum and effective potential. We noted that the negative values of tidal charge and cosmological constant decreases the energy of particles. In addition, the negative value of cosmological constant leads us to the stable circular orbits, whereas its positive value destabilizes the circular orbits. Our exploration shows that the cosmological constant diminishes the radius of the black hole shadow. In response to the dragging effect, black hole rotation elongates its shadow toward the rotational axis. Besides, black hole spin and positive charge distort shadow and its distortion become maximum as far as the black hole rotates faster. We also discussed the energy emission rate by considering different cases and compared our result with the standard Kerr black hole.

show abstract

Section: Discussionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Geodesics and optical properties of rotating black hole in Randall-Sundrum brane with a cosmological constant

Khan¹,

Ren²

2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…A close inspection has revealed that DE affects also the optical aspect which has been dealt with using the shadow geometries in terms of one dimensional real curves. For certain black holes solutions, DE can be considered as a geometric deformation parameter controlling the size of the shadows [36,[45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Optical Behaviors of Quintessential Hayward-AdS Black Holes

Belhaj,

Benali,

Moumni

et al. 2022

Preprint

View full text Add to dashboard Cite

Motivated by Dark Energy (DE) activities, we study certain physical behaviors of the quintessential Hayward-AdS black holes in four dimensions. We generalize some physical properties of the ordinary Hayward AdS black holes without the dark sector. We elaborate a study in terms of the new quantities c and ω q parametrizing the dark sector moduli space. We investigate the effect of such parameters on certain thermodynamic and optical aspects. To show the quintessential thermodynamic behaviors, we first reconsider the critical properties of the ordinary solutions. We find that the equation of state predicts a universal ratio given by χ 0 = Pcvc Tc = 27−3 √ 6 50

show abstract

“…The first concept has been discussed in terms of one dimensional real curves [14][15][16][17]. In this way, the corresponding size and shape have been controlled by the involved black hole parameters [18][19][20][21][22]. The second notion concerns the deflection angle of light rays by black holes which has been investigated using different methods [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Light Deflection by Rotating Regular Black Holes with a Cosmological Constant

Belhaj¹,

H.²,

Benali³

et al. 2022

Preprint

View full text Add to dashboard Cite

Using the Gauss-Bonnet theorem, we compute and examine the deflection angle of light rays by rotating regular black holes with a cosmological constant. By the help of optical geometries, we first deal with the Hayward black holes with cosmological contributions. Then, we reconsider the study of the Bardeen solutions. We inspect the cosmological constant effect on the deflection angle of light rays. Concretely, we find extra cosmological correction terms generalizing certain obtained findings. Using graphical analysis, we provide a comparative discussion with respect to the Kerr solutions. The results confirm that the non-linear electrodynamic charges affect the space-time geometry by decreasing the deflection angle of light rays by such cosmological black holes.

show abstract

Shadow cast by a rotating charged black hole in quintessential dark energy

Cited by 4 publications

References 40 publications

Geodesics and optical properties of rotating black hole in Randall-Sundrum brane with a cosmological constant

Geodesics and optical properties of rotating black hole in Randall-Sundrum brane with a cosmological constant

Thermodynamic and Optical Behaviors of Quintessential Hayward-AdS Black Holes

Light Deflection by Rotating Regular Black Holes with a Cosmological Constant

Contact Info

Product

Resources

About