6 papers
Kinematic Bounds on Charged Energy Extraction in the Purely Electric Branch of Euler--Heisenberg Type f(R,T) Black Holes
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin
We derive and test kinematic upper bounds on charged energy extraction in the purely electric branch of a static black hole family sourced by an Euler--Heisenberg type non…
Charged Penrose Extraction in RN--AdS Black Holes with Dark Energy: Ergosphere Geometry and Rigorous Efficiency Bounds
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin
We develop a quantitative framework for charge assisted Penrose extraction in Reissner--Nordström Anti-de Sitter black holes surrounded by a Kiselev type anisotropic dark energy se…
Coupled Gravitoelectromagnetic Response of a Magnetically Supported Generalized Hayward Black Hole in Nonlinear Electrodynamics
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin +1
We construct the exterior coupled gravitational and electromagnetic response of a magnetically supported generalized Hayward black hole within a specified nonlinear electrodynamic…
Finite mass two throat wormholes: global light rings, branch resolved strong lensing, and scalar transmission
Anirudh Pradhan, K. Ghaderi, M. Zeyauddin +1
We introduce a static, horizonless, asymptotically flat two throat wormhole family in which one global metric determines the geometry, effective source, null dynamics, lensing, and…
Oscillatons in Scalar-Field Dark Matter from a Full Fourier Expansion of an Exponential Potential
A. Mahmoodzadeh, K Ghaderi, P. Amiri
Real, time-dependent scalar fields can form oscillating, self-gravitating configurations-oscillatonsthat are viable candidates for scalar-field dark matter (SFDM). We revisit oscil…
Real particle geodesics and thermodynamics of a black hole in Regular Schwarzschild-Anti de Sitter space-time
A. Mahmoodzadeh, B. Malakolkalami, K. Ghaderi
Regular Schwarzschild Anti-de-Sitter (RSch-AdS) spacetime, which is a maximally symmetric and Lorentzian manifold of negative curvature, is a solution of Einstein's field equations…