72 citations · 133 across the 22 of their papers we have counts for
27 papers
Testing Charged Black Holes Embedded in Anisotropic Matter and Surrounded by Plasma through Gravitational Lensing: Bounds from the Sloan Lens ACS Survey
Ritesh Pandey, Shubham Kala, Amare Abebe +2
We investigate weak gravitational lensing by a charged black hole surrounded by anisotropic matter, described by the two-component Kiselev metric, and immersed in a homogeneous pla…
Onset of Chaos and Orbital Instabilities around Rotating Weyl Black Holes
Shubham Kala, M. Yousaf, Pradeep Singh +3
We investigate nonlinear photon motion in the vicinity of a rotating black hole (BH) within Weyl conformal gravity (WCG) by employing Poincare sections, Lyapunov exponents, Fast Ly…
Strong Gravitational Lensing by Lorentzian-Euclidean Black Hole
Rukkiyya V. P, Shubham Kala, Sini R
We investigate the strong gravitational lensing properties of the Lorentzian Euclidean black hole, a spacetime in which the horizon at is not a coordinate singularity but a…
Probing Quantum Gravity through Chaotic Orbits and Strong-Field Effects in Kerr Black Holes Embedded in Perfect Fluid Dark Matter
Shubham Kala, Sara Saghafi, M. Yousaf +4
We study the nonlinear photon dynamics in quantum improved rotating black hole surrounded by perfect fluid dark matter (PFDM) using several methods of analysis, including Poincaré…
Light bending around the Kerr-Bertotti-Robinson black hole using material medium approach
Saswati Roy, Anshul Tapase, Shubham Kala +2
In this paper, we study the deflection of massless particles due to a rotating, axially symmetric Kerr-Bertotti-Robinson (KBR) black hole via; material medium approach. We explored…
Light Deflection and Greybody Bound Around a BTZ-ModMax Black Hole in Plasma Medium
Ritesh Pandey, Shubham Kala, Amare Abebe +2
We study the deflection of light in a homogeneous plasma medium around a BTZ-ModMax black hole, focusing on the effects of the ModMax nonlinear electrodynamics parameter and the co…
Gravitational lensing around a Kerr-Sen black hole in plasma background
Saswati Roy, Shubham Kala, Sayanika Modak +2
We investigate the gravitational lensing of massless particles around a Kerr-Sen black hole immersed in a magnetized, cold, pressureless plasma medium. Both homogeneous and inhomog…
Charged Black Holes in Bumblebee gravity with Global Monopole: Thermodynamics and Shadow
Faizuddin Ahmed, Shubham Kala, Edilberto O. Silva
In this paper, we perform a detailed study of the thermodynamic properties of a charged black hole in bumblebee gravity in the presence of a global monopole. We also analyze the op…
Shadow of Bonanno-Reuter Black Hole in Plasma Medium: Insights from EHT Sgr A* Observations
Shubham Kala
We investigate the properties of black hole shadows in the renormalization group (RG) improved Bonanno-Reuter spacetime, incorporating quantum gravitational corrections via the sca…
Thermodynamics and Optical Properties of Charged Black Holes in Bumblebee gravity Sourced by a Cloud of Strings
Faizuddin Ahmed, Shubham Kala, Ahmad Al-Badawi
In theories where the Lorentz symmetry of gravity is spontaneously broken, a non-minimally coupled bumblebee vector field acquires a nonzero vacuum expectation value, leading to mo…
Strong Gravitational Lensing by a Black Hole with a Global Monopole in Kalb-Ramond Bumblebee Gravity
Bijendra Kumar Vishvakarma, Shubham Kala
We investigate the strong gravitational lensing and shadow properties of the black hole in the context of bumblebee gravity, characterized by a global monopole charge and a…
Geodesics and Light Deflection in Schwarzschild-like Spacetime from Cosmology-Inspired Modified Gravity
Ritesh Pandey, Shubham Kala, Amare Abebe +2
We investigate cosmology-driven modifications to Schwarzschild-like black hole spacetimes and analyze their impact on photon propagation, gravitational lensing, and shadow observat…
Gravitational Lensing and Topological Photon Sphere of Holonomy Corrected Schwarzschild Black Hole with a Cloud of Strings
Faizuddin Ahmed, Shubham Kala
In this paper, we theoretically investigate the deflection of light, lensing equations, topological properties of photon rings, and accretion disk characteristics in the spacetime…
Gravitational lensing and shadow around a non-minimally coupled Horndeski black hole in plasma medium
Shubham Kala, Jaswinder Singh
We investigate the light deflection and the shadow characteristics of a non-minimally coupled Horndeski black hole surrounded by a magnetized, cold, pressureless plasma medium, whi…
Equatorial light bending around a Hairy Kiselev Black Hole
Shrishti Kukreti, Shubham Kala, Hemwati Nandan +2
We investigate the deflection angle of light rays confined to the equatorial plane of a Hairy Kiselev black hole. The analysis includes a thorough study of the horizon structure an…
Non-Equatorial Deflection of Light due to Kerr-Newman Black Hole: A Material Medium Approach
Saswati Roy, Shubham Kala, Prasanjit Ghosh +2
We explored the effect of space-time geometry on the trajectory of light rays in the context of a charged, rotating black hole. We derived an analytical expression for the deflecti…
Deflection of Light due to Kerr Sen Black Hole in Heterotic String Theory using Material Medium Approach
Saswati Roy, Shubham Kala, Atanu Singha +2
The deflection of light in the gravitational field of a massive body can be analyzed through diverse theoretical approaches. The null geodesic approach is commonly employed to calc…
Quasinormal modes of a dyonic black hole in Einstein-Euler-Heisenberg theory
Shubham Kala, Abhishek Negi, Hemwati Nandan
In this study, we investigate the quasinormal modes of a non-rotating dyonic black hole within the framework of Einstein-Euler-Heisenberg theory. We present a detailed analysis foc…
Null Geodesics, Thermodynamics, Weak Gravitational Lensing, and Black Hole Shadow Characteristics of a Frolov Regular Black Hole with Constraints from EHT Observations
Shubham Kala, Hemwati Nandan, Kush Maithani +2
In this paper, we investigate the properties of null geodesics, thermodynamics, gravitational lensing, and black hole shadows in the vicinity of a static regular Frolov black hole.…
QNMs of charged black holes in AdS spacetime: a geometrical optics perspective
Shubham Kala, Anik Rudra, Hemwati Nandan
We investigate the quasinormal modes of the ReissnerNordström antide Sitter black hole using the Penrose limit, motivated by the geometrical optics approximation. This approa…
Propagation of massless particles around a BTZ-ModMax black hole
Shubham Kala
We investigate the deflection of light around a BTZ-ModMax black hole, focusing on the influence of the ModMax parameter and the cosmological constant. The trajectories of massless…
Testing black holes with cosmological constant in Einstein-bumblebee gravity through the black hole shadow using EHT data and deflection angle
Reggie C. Pantig, Shubham Kala, Ali Övgün +1
This study probes spacetime solutions within Einstein-Bumblebee gravity, a modified gravitational framework incorporating spontaneous Lorentz symmetry violation through a vector fi…
Strong Gravitational Lensing by Bardeen Black Hole in Cloud of Strings
Bijendra Kumar Vishvakarma, Shubham Kala, Sanjay Siwach
We investigate the gravitational lensing by Bardeen black hole in cloud of strings (CoS) in strong field limit. The effect of CoS parameter has been outlined in comparison with…
Shadow and weak gravitational lensing of a rotating regular black hole in a non-minimally coupled Einstein-Yang-Mills theory in the presence of plasma
Shubham Kala, Hemwati Nandan, Prateek Sharma
The null geodesics of the regular and rotating magnetically charged black hole in a non-minimally coupled Einstein-Yang-Mills theory surrounded by a plasma medium is studied. The e…