arXiv subjects

Filip Studnička

Publications and source records attributed to Filip Studnička.

2 recordsLinked to original sources

arXiv2025

Optical, Dynamic and Topological Characteristics of Deformed Schwarzschild Black Holes

We investigate the temperature, photon and shadow radii, quasinormal modes (QNMs), time domain profiles, greybody factors, emission rates and topological characteristics of deformed black holes, focusing on the effects of the deformation parameter $ α$ and control parameter $ β$. Increasing $ α$ enhances the oscillation frequency and damping rate of gravitational waves, while $ β$ shows non-linear behaviour. Electromagnetic perturbations exhibit similar trends, though with lower frequencies and damping rates. Greybody factors are mainly influenced by multipole moment $l$ and $ α$, with $ β$ having a more subtle effect. These findings provide insights into black hole dynamics, mergers, and gravitational wave emissions.

hep-th↗

arXiv2025

Quasinormal Modes and Topological Characteristics of a Schwarzschild Black Hole Surrounded by the Dehnen Type Dark Matter Halo

In this work, we explore the critical parameters that delineate the existence of black holes, identifying the permissible ranges that facilitate their formation. A comprehensive thermodynamic analysis of black holes is conducted, leading to the calculation of black hole remnants. We investigate the trajectory of light, establishing an upper limit for the parameters based on Event Horizon Telescope (EHT) observations of Sgr A*, ensuring that the black hole's shadow resides within the allowed region. Furthermore, we derive the quasinormal modes (QNMs) for both scalar and electromagnetic perturbations. Utilizing a topological framework, we examine the stability of the photon sphere and classify the topology of the black hole in accordance with its thermodynamic potentials.

gr-qc↗