6 papers
Probing Kalb-Ramond gravity with charged rotating black holes: constraints from EHT observations
Towheed Ahmad Nengroo, Shafqat Ul Islam, Sushant G. Ghosh
The Event Horizon Telescope (EHT) has guided strong-field gravitational physics by providing the first direct images of the supermassive black holes M87* and Sagittarius A*. The EH…
Probing Lorentz Symmetry Violation through Lensing Observables of Rotating Black Holes
Arun Kumar, Shafqat Ul Islam, Sushant G. Ghosh
We find a Kerr-like black hole solution-a rotating Bumblebee black hole (RBBH) with a Lorentz-violating parameter and examine the strong lensing by it. The parameter …
Testing Strong Gravitational Lensing Effects of Supermassive Black Holes with String-Inspired Metric: Observational Signatures and EHT Constraints
Amnish Vachher, Shafqat Ul Islam, Rahul Kumar Walia +1
We analyze gravitational lensing in the strong field limit for spherically symmetric string-inspired Euler-Heisenberg black holes, characterized by magnetic charge () and Einste…
Shadows and parameter estimation of rotating quantum corrected black holes and constraints from EHT observation of M87* and Sgr A*
Heena Ali, Shafqat Ul Islam, Sushant G. Ghosh
The scarcity of quantum gravity (QG) inspired rotating black holes limits the progress of testing QG through Event Horizon Telescope (EHT) observations. The EHT imaged the supermas…
Photon orbits and phase transition for gravitational decoupled Kerr anti-de Sitter black holes
Suhail Khan, Shafqat Ul Islam, Sushant G. Ghosh +1
Interpreting the cosmological constant as the energy of the vacuum and using a gravitational decoupling approach leads to a new Kerr--anti-de Sitter (AdS) black hole. The metric of…
Investigating Rotating Black Holes in Bumblebee Gravity: Insights from EHT Observations
Shafqat Ul Islam, Sushant G. Ghosh, Sunil D. Maharaj
The EHT observation revealed event horizon-scale images of the supermassive black holes Sgr A* and M87* and these results are consistent with the shadow of a Kerr black hole as pre…