Bushra Majeed

This work explores the trajectories of test particles moving around a charged Black Hole subject to quantum corrections. The gravitational background follows a Reissner–Nordström configuration embedded in a Kiselev spacetime. Using the effective potential formalism, circular orbits in equatorial plane are analyzed. Analytical forms of conserved energy and angular momentum are derived. The study identifies the location of innermost stable circular orbits and investigates the effective force. Additionally, oscillations near the equatorial plane are examined to compute the radial, vertical and orbital frequencies as well as the periastron precession frequency. The overall results show that the model parameter significantly affects the evolution of test particle motion within the gravitational field. In addition to the dynamical analysis, the thermodynamics behavior of the Black Hole is also examined. We study the profile of mass, temperature, specific heat and energy emission. This helps us understand how the model parameters affect thermal stability and radiation. Overall, the model remains thermodynamically consistent.

In this work, we study gravitational wave emission from periodic orbits of test particles, analyze quasi periodic oscillations, and constrain the parameters of the static, spherically symmetric Einstein nonlinear Maxwell Yukawa black hole. Using the Hamiltonian approach, we calculate the equations of motion of the particles. We analyze the effective potential to determine the innermost stable circular orbit and innermost bound circular orbit, illustrating how the Yukawa screening parameter and electric charge Q affect orbital stability and energy requirements. Periodic orbits are classified by integer triplets and exhibit characteristic zoom whirl behavior. Based on these orbits we compute the corresponding GW signals in both the polarizations. Finally, we perform Monte Carlo Markov Chain MCMC simulations to constrain the parameters of the ENLMY BH for four microquasars and the galactic center within the relativistic precession model.

In this article, we have studied the dynamics of electrically and magnetically charged particles in the spacetime of Loop Quantum Gravity-Corrected Schwarzschild black hole (LQGBH). We consider the loop quantum gravity (LQG) immersed in an external asymptotically uniform magnetic field. The effects of LQG spacetime on dynamics of the particles is studied. We have discussed the circular orbits of the particles about the central object and studied the dependence of the inner stable circular orbits (ISCO) on the magnetic coupling parameter and the black hole parameters. We have also studied the effects of LQG parameters on the specific angular momentum, energy and inner stable circular orbits (ISCOs). We calculated the minimum energy energy and angular momentum of the magnetised paticles required to move in the ISCO. We did this analysis by first calculating the magnetic coupling parameter of the LQGBH spacetime. We have also investigated the collision of neutral, electrically and magnetically charged particles and their centre of mass energy. It is observed that magnetic filed around black hole increases the particle acceleration around LQGBH. The synchrotron radiations coming out of the charged particle (accelerated by electromagnetic forces Coulomb and Lorentz; in the surrounding of the magnetized LQGBH is analysed.