Charged Black Holes in Bumblebee gravity with Global Monopole: Thermodynamics and Shadow

TL;DR

This paper explores the thermodynamics, optical properties, particle trajectories, and scalar perturbations of a charged black hole in bumblebee gravity with a global monopole, emphasizing Lorentz violation effects.

Contribution

It provides a comprehensive analysis of black hole shadow, particle orbits, and greybody factors in a Lorentz-violating gravity model with monopole influence.

Findings

Global monopole and Lorentz violation significantly affect black hole shadow size.

Innermost stable circular orbits (ISCOs) are altered by geometric parameters.

Greybody factors and scalar field propagation are influenced by the black hole's structure.

Abstract

In this paper, we perform a detailed study of the thermodynamic properties of a charged black hole in bumblebee gravity in the presence of a global monopole. We also analyze the optical characteristics of this black hole solution, highlighting the influence of Lorentz symmetry violation and the global monopole on the black hole shadow. Furthermore, we examine the trajectories of both photons and test particles in this spacetime, showing how the geometric parameters alter their paths. Moreover, we study the dynamics of neutral test particles, with particular attention to the location of the innermost stable circular orbits (ISCOs). Finally, we investigate massless scalar perturbations and derive bounds on the greybody factors, illustrating how the black hole's geometric parameters affect field propagation, energy emission, and radiation sparsity in this background.