Shadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field

Abstract

In this work, we observe that in the presence of the string cloud parameter $a$ and the quintessence parameter $\gamma$, with the equation of state parameter ${\omega }_q=-2/3$ the radius of the shadow of the Schwarzschild black hole increases as compared with the pure Schwarzschild black hole case. The existence of both quintessential dark energy and cloud of strings magnify the shadow size and hence the strength of the gravitational field around the Schwarzschild black hole increases. Using the data collected by the Event Horizon Telescope (EHT) collaboration for the M87* and Sgr A*, we obtain upper bounds on the values of the parameters $a$ and $\gamma$. Further, we see the effects of the parameters $a$ and $\gamma$ on the rate of emission energy for the Schwarzschild black hole. We notice that the rate of emission energy is higher in the presence of clouds of string and quintessence. Moreover, we study the weak deflection angle using the Gauss-Bonnet theorem. We show the influence of the cloud of string parameter $a$ and the quintessential parameter $\gamma$ on the weak deflection angle. We notice that both the parameters $a$ and $\gamma$ increase the deflection angle $\alpha$.

12 pages, 9 figures, Accepted for publication in Chinese Physics C

References in corpus (26)

• First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
• Cosmology and the Fate of Dilatation Symmetry
• First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Measurement of the Kerr Spin Parameter by Observation of a Compact Object's Shadow
• Applications of the Gauss-Bonnet theorem to gravitational lensing
• Black holes with scalar hair in light of the Event Horizon Telescope
• Shadow of five-dimensional rotating Myers-Perry black hole
• Shadows of Einstein-dilaton-Gauss-Bonnet black holes
• Frequency-dependent effects of gravitational lensing within plasma
• Finite-distance corrections to the gravitational bending angle of light in the strong deflection limit
• Shadow cast and deflection of light by charged rotating regular black holes
• The effect of the Brane-Dicke coupling parameter on weak gravitational lensing by wormholes and naked singularities
• Weak gravitational lensing of regular black holes with cosmic strings using the Gauss-Bonnet theorem
• Finite-distance gravitational deflection of massive particles by the Kerr-like black hole in the bumblebee gravity model
• Shadows of Sgr A${}^{\ast }$ Black Hole Surrounded by Superfluid Dark Matter Halo
• Circular orbit of a particle and weak gravitational lensing
• Dark matter effect on the weak deflection angle by black holes at the center of Milky Way and M87 galaxies
• Shadow, quasinormal modes and quasiperiodic oscillations of rotating Kaluza-Klein black holes
• Effect of the dilaton field and plasma medium on deflection angle by black holes in Einstein-Maxwell-dilaton-axion theory
• Effect of Non-linear Electrodynamics on Weak field deflection angle by Black Hole
• Effect of the quintessential dark energy on weak deflection angle by Kerr-Newmann Black hole
• Motion of Particles and Gravitational Lensing Around (2+1)-dimensional BTZ black holes in Gauss-Bonnet Gravity
• Geometrization of light bending and its application to SdSw spacetime
• Kerr-Newman-Jacobi geometry and the deflection of charged massive particles
• SNe Ia Tests of Quintessence Tracker Cosmology in an Anisotropic Background

Cited by in corpus (6)

• Constraints on charged Symmergent black hole from shadow and lensing
• Weak deflection angle by Kalb-Ramond Traversable Wormhole in Plasma and Dark Matter Mediums
• Probing Geometric Proca in Metric-Palatini Gravity with Black Hole Shadow and Photon Motion
• Photon orbits and phase transition for Letelier AdS black holes immersed in perfect fluid dark matter
• Optical appearance of the Schwarzschild black hole in the string cloud context
• Observational signatures of Rotating compact objects in Plasma space-time