38 papers
Quantum-Corrected Black Holes in Higher Dimensions: From Gravitational Collapse to Remnants, WGC-Like Behavior and Accretion Signatures
Saeed Noori Gashti, Umair Anwar, Abdul Jawad +4
We study the gravitational collapse of a homogeneous dust sphere in higher-dimensional spacetime, with the loop quantum gravity correction entered through a modified Friedmann equa…
Stationary scalar clouds, quasinormal ringing, and observational signatures of (near-)extremal rotating Kalb-Ramond black holes: from the superradiant threshold to EHT bounds
Gülnihal Tokgöz, İzzet Sakallı
We study a massive scalar field on the rotating Kalb-Ramond black hole of Kumar, Ghosh and Wang, in the (near-)extremal corner of its three-parameter family . We verify…
Quark Stars in Gravity: Structure, Stability, and Observational Constraints
Takol Tangphati, Ayan Banerjee, Izzet Sakalli +2
The paper investigates how quark stars behave in the modified teleparallel gravity theory f(T,𝒯), solving the stellar structure equations with the MIT bag model and examining how…
Quantum-Corrected Thermodynamics, Dirac Perturbations, Geodesic Structure, and Topological Phases of Black Holes with Non-Minimal Logarithmic Coupling
Ä°zzet Sakallı, Ãzcan Sert, Erdem Sucu +1
We study the thermodynamic and dynamical properties of static, spherically symmetric BHs in Einstein-Maxwell theory modified by a non-minimal coupling. The Hawking te…
Systematic Light Propagation Bias from the Heliosphere and Its Impact on the Hubble Tension
Behnam Pourhassan, İzzet Sakallı, Sudhaker Upadhyay +1
The Hubble tension (HT) represents one of the most significant discrepancies in modern cosmology, with local distance measurements yielding km/s/Mpc while cosm…
Branch structure and nonextensive thermodynamics of Kalb-Ramond-ModMax black holes: observational signatures
Erdem Sucu, Izzet Sakalli, Emmanuel N. Saridakis
Motivated by the low-energy effective action of heterotic string theory, where the Kalb-Ramond (KR) two-form and nonlinear gauge corrections arise simultaneously, we investigate a…