Shadows and strong gravitational lensing by Van der Waals black hole in homogeneous plasma

Molla, Niyaz Uddin; Debnath, Ujjal

doi:10.1016/j.aop.2023.169304

Cited by 5 publications

(2 citation statements)

References 79 publications

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“…Numerous studies have been dedicated to examining gravitational lensing caused by a variety of sources, including the distribution of structures. [38][39][40], dark energy [41][42][43], dark matter (DM) [44][45][46], quasars [47][48][49][50], gravitational waves [51][52][53] and various other compact celestial objects [54][55][56][57][58]. Recently, the Event Horizon Telescope collaboration successfully achieved an angular resolution that enables the observation of the image of the supermassive black hole situated at the center of the M87 galaxy.…”

Section: Introductionmentioning

confidence: 99%

Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Molla,

Chaudhary,

Mustafa

et al. 2024

Eur. Phys. J. C

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We investigate the strong gravitational lensing phenomena caused by a black hole with a dark matter halo in the presence of cloud string and quintessence. This study examines strong gravitational lensing with two significant dark matter models: the universal rotation curve model and the cold dark matter model. To do this, we first numerically estimate the strong lensing coefficients and strong deflection angles for both the universal rotation curve and cold dark matter models. It is observed that the deflection angle, denoted as $$\alpha _D$$ α D , increases with the parameter $$\alpha $$ α while holding the value of $$2M \gamma $$ 2 M γ constant. Additionally, it increases with the parameter $$2M \gamma $$ 2 M γ while keeping the value of $$\alpha $$ α constant. The strong deflection angle $$\alpha _D$$ α D , for the black hole with a dark matter halo, with parameters $$\alpha $$ α and $$2\,M \gamma $$ 2 M γ , greatly enhances the gravitational bending effect and surpasses the corresponding case of the standard Schwarzschild black hole ($$A=B=0=\alpha =2M\gamma $$ A = B = 0 = α = 2 M γ ). Furthermore, we investigate the astrophysical consequences through strong gravitational lensing observations, using examples of two supermassive black holes, namely $$M87^{*}$$ M 87 ∗ and $$Sgr A^{*}$$ S g r A ∗ , located at the center of nearby galaxies. It is observed that black holes with dark matter halos in the presence of cloud string and quintessence can be quantitatively distinguished and characterized from the standard Schwarzschild black hole ($$A=B=0=\alpha =2M\gamma $$ A = B = 0 = α = 2 M γ ). The findings in our analysis suggest that observational tests for black holes influenced by dark matter halos, cloud string and quintessence are indeed feasible and viable.

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Section: Introductionmentioning

confidence: 99%

Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Molla,

Chaudhary,

Mustafa

et al. 2024

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Subsequently, there has been a surge of activity in both analytical/numerical investigations and observational studies related to the shadows cast by the different kind of black holes [28,[55][56][57][58][59][60][61][62][63]. Numerous studies have been conducted in this area, including those by the works of literature [64][65][66][67][68][69][70].…”

Section: Introductionmentioning

confidence: 99%

Exploring tidal force effects and shadow constraints for Schwarzschild-like black hole in Starobinsky–Bel-Robinson gravity

Arora,

Molla,

Chaudhary

et al. 2023

Eur. Phys. J. C

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The current manuscript deals with the tidal force effects, geodesic deviation, and shadow constraints of the Schwarzschild-like black hole theorised in Starobinsky–Bel-Robinson gravity exhibiting M-theory compactification. In the current analysis, we explore the radial and angular tidal force effects on a radially in-falling particle by the central black hole, which is located in this spacetime. We also numerically solve the geodesic deviation equation and study the variation of the geodesic separation vector with the radial coordinate for two nearby geodesics using suitable initial conditions. All the obtained results are tested for Sag A* and M87* by constraining the value of the stringy gravity parameter $$\beta $$ β using the shadow data from the event horizon telescope observations. All the results are compared with Schwarzschild black hole spacetime. In our study, we found that both the radial and angular tidal forces experienced by a particle switch their initial behaviour and turn compressive and stretching, respectively, before reaching the event horizon. The geodesic deviation shows an oscillating trend as well for the chosen initial condition. For the constrained value of $$\beta $$ β , we see that the spacetime geometry generated by Sag A* and M87* is effectively same for both Schwarzschild and Starobinsky–Bel-Robinson black hole. Furthermore, we also calculated the angular diameter of the shadow in Starobinsky–Bel-Robinson black hole and compared with the Schwarzschild black hole. It is observed that the angular diameter of shadow for M87* and Sgr A* in Starobinsky–Bel-Robinson black hole is smaller than the Schwarzschild black hole. The calculated results satisfy the event horizon telescope observational constraints.

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Noncommutative Schwarzschild black hole surrounded by quintessence: Thermodynamics, Shadows and Quasinormal modes

Hamil,

Lütfüoğlu

2024

Physics of the Dark Universe

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Shadows and strong gravitational lensing by Van der Waals black hole in homogeneous plasma

Cited by 5 publications

References 79 publications

Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Exploring tidal force effects and shadow constraints for Schwarzschild-like black hole in Starobinsky–Bel-Robinson gravity

Noncommutative Schwarzschild black hole surrounded by quintessence: Thermodynamics, Shadows and Quasinormal modes

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Shadows and strong gravitational lensing by Van der Waals black hole in homogeneous plasma

Cited by 5 publications

References 79 publications

Strong gravitational lensing by $$Sgr A^*$$ and $$M87^*$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Strong gravitational lensing by $$Sgr A^*$$ and $$M87^*$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Exploring tidal force effects and shadow constraints for Schwarzschild-like black hole in Starobinsky–Bel-Robinson gravity

Noncommutative Schwarzschild black hole surrounded by quintessence: Thermodynamics, Shadows and Quasinormal modes

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Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field

Strong gravitational lensing by $$Sgr A^$$ and $$M87^$$ black holes embedded in dark matter halo exhibiting string cloud and quintessential field