8 papers
A Quantum-Gravity-Motivated GUP Effective Metric
M. H. Al Ghifari, M. F. Fauzi, A. Rohim +3
Recent critiques have addressed certain aspects of the generalized uncertainty principle (GUP) effective metric (Ong 2023). This study presents a scale-dependent quadratic GUP effe…
Ambiguity in matter sector for modified gravity involving and its implications to astrophysics and cosmology
B. N. Jayawiguna, A. Sulaksono
Matter density () and radial pressure () are often used as the matter Lagrangian density () because both are thermodynamically consistent and produce the sam…
Astrophysical environment around a black hole in the braneworld and its optical signatures
M. F. Fauzi, A. O. Latief, A. Sulaksono
We investigate the impact of braneworld theory on the astrophysical environment surrounding a black hole. The black hole is sourced by localized matter from the bulk, which could d…
Two descriptions of dark matter around a black hole: photon sphere, shadow, and lensing
M. F. Fauzi, H. S. Ramadhan, A. Sulaksono
We examine the observational discrepancies of two widely used models describing anisotropic (dark) matter distributions around a black hole, focusing on their photon spheres, shado…
Imaging the destruction of a rotating regular black hole
M. F. Fauzi, H. S. Ramadhan, A. Sulaksono +1
A regular black hole, unconstrained by the weak cosmic censorship conjecture, can exceed its critical spin limit and transition into a superspinar. In this paper, we investigate th…
Horizonless star based on regular black hole with finite radius and its observational signatures
M. F. Fauzi, B. N. Jayawiguna, H. S. Ramadhan +1
The horizonless configuration of regular black holes has recently attracted attention as a model for ultracompact stars. In this paper, we propose a new class of regular black hole…