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As a vector-tensor theory including nonminimal coupling between the Ricci tensor and a vector field, the bumblebee gravity is a potential theory to test Lorentz symmetry violation. Recently, a new class of numerical spherical black holes in…

General Relativity and Quantum Cosmology · Physics 2023-07-14 Zhan-Feng Mai , Rui Xu , Dicong Liang , Lijing Shao

We study the deflection of light in a homogeneous plasma medium around a BTZ-ModMax black hole, focusing on the effects of the ModMax nonlinear electrodynamics parameter and the cosmological constant. Using the Gauss-Bonnet theorem applied…

General Relativity and Quantum Cosmology · Physics 2026-05-08 Ritesh Pandey , Shubham Kala , Amare Abebe , Hemwati Nandan , G. G. L. Nashed

We investigate how the newly obtained static black hole in bumblebee gravity affects the behavior of accreting matter and its observable signatures. The Lorentz-violating parameter that characterizes this geometry modifies photon…

General Relativity and Quantum Cosmology · Physics 2026-03-09 Yuxuan Shi , A. A. Araújo Filho

In this paper we study the thermodynamics of Einstein-Gauss-Bonnet (EGB)-AdS black holes minimally coupled to a cloud of strings in an extended phase space where the cosmological constant is treated as pressure of the black holes and its…

General Relativity and Quantum Cosmology · Physics 2018-08-29 Hossein Ghaffarnejad , Emad Yaraie

In this work, we investigate the scattering and absorption of spin 0 particles for electrically charged black holes in two gravity models with spontaneous Lorentz symmetry breaking. The first one is the so-called bumblebee model that…

General Relativity and Quantum Cosmology · Physics 2026-05-19 F. M. Belchior

This study investigates a black hole surrounded by a cloud of strings and a cosmological dark fluid characterized by a modified Chaplygin-like equation of state (MCDF), $p=A\rho-B/\rho^{\beta}$. We analyze its geodesic structure, shadow,…

General Relativity and Quantum Cosmology · Physics 2025-05-20 Xiang-Qian Li , Yoonbai Kim , Bum-Hoon Lee , Hao-Peng Yan , Xiao-Jun Yue

We investigate the deflection of light around a BTZ-ModMax black hole, focusing on the influence of the ModMax parameter and the cosmological constant. The trajectories of massless particles are explored through an analysis of null…

General Relativity and Quantum Cosmology · Physics 2025-12-15 Shubham Kala

We investigate the thermodynamics, criticality, and selected radiative and optical properties of an Euler-Heisenberg AdS black hole surrounded by quintessence, perfect fluid dark matter, and a cloud of strings. Within the extended…

General Relativity and Quantum Cosmology · Physics 2026-04-29 Faizuddin Ahmed , Edilberto O. Silva

In this study, we explore the thermodynamic properties of a Schwarzschild black hole (BH) embedded in an anti-de Sitter (AdS) background, which is further coupled with a cloud of strings and surrounded by a quintessence-like fluid.…

General Relativity and Quantum Cosmology · Physics 2025-12-23 Faizuddin Ahmed , Saeed Noori Gashti , Behnam Pourhassan , Abdelmalek Bouzenada

Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical…

General Relativity and Quantum Cosmology · Physics 2022-08-16 Jiale Gu , Shafqat Riaz , Askar B. Abdikamalov , Dimitry Ayzenberg , Cosimo Bambi

We re-derive an exact analytic three-parameter expressions for the non-rotating metric, describing a Taub-NUT-like black hole (BH), and its associated bumblebee field that are solutions to the Einstein-bumblebee gravity. We construct a…

General Relativity and Quantum Cosmology · Physics 2025-12-10 Mustapha Azreg-Aïnou , Yassine Sekhmani

This study investigates a Schwarzschild-anti de Sitter black hole coupled to a cloud of strings featuring only the electric-like component of the string bivector, embedded in a perfect fluid dark matter and a quintessence field. We examine…

General Relativity and Quantum Cosmology · Physics 2025-10-28 Faizuddin Ahmed , Edilberto O. Silva

In this paper, we investigate the gravitational lensing effect and the shadow around a Schwarzschild-like black hole in metric-affine bumblebee gravity, which leads to the Lorentz symmetry breaking. We first present a generalized formalism…

General Relativity and Quantum Cosmology · Physics 2024-09-20 Xiao-Jun Gao

In this paper, we derive an exact black hole spacetime metric in the Einstein-Hilbert-Bumblebee (EHB) gravity around global monopole field. We study the horizon, temperature, and the photon sphere of the black hole. Using the null geodesics…

General Relativity and Quantum Cosmology · Physics 2021-12-21 İbrahim Güllü , Ali Övgün

In this paper, we investigate Schwarzschild-like black holes within the framework of metric-affine bumblebee gravity. We explore the implications of such a gravitational setup on various astrophysical phenomena, including the presence of an…

General Relativity and Quantum Cosmology · Physics 2024-01-09 G. Lambiase , L. Mastrototaro , Reggie C. Pantig , Ali Ovgun

We obtain the metric which describes the spacetime corresponding to the Frolov black hole in the presence of a cloud of strings and discuss how this cloud affects the regularity of the solution and the energy conditions. In addition, we…

General Relativity and Quantum Cosmology · Physics 2026-01-14 F. F. Nascimento , J. C. Rocha , V. B. Bezerra , J. M. Toledo

In this paper, we study the polymer black hole solution surrounded by a quintessence field. The influence of quintessence on the polymer black hole is investigated through its thermodynamic properties, such as the Hawking temperature,…

General Relativity and Quantum Cosmology · Physics 2025-07-11 M. C. Araújo , J. G. Lima , C. R. Muniz , J. Furtado

We obtain a black hole solution in the Einstein-Gauss-Bonnet theory for the string cloud model in a five dimensional spacetime. We analyze the event horizons and naked singularities. Later, we compute the Hawking temperature…

High Energy Physics - Theory · Physics 2016-08-14 Estanislao Herscovich , Martín G. Richarte

In this work, we investigate the thermodynamics and motion of neutral test particles around a regular black hole immersed in a perfect fluid dark matter environment. We begin by examining the horizon structure and key thermodynamic…

General Relativity and Quantum Cosmology · Physics 2026-04-16 Faizuddin Ahmed , Sardor Murodov , Bekzod Rahmatov

Recently Bandos, Lechner, Sorokin, and Townsend [Phys. Rev. D \textbf{102}, 121703 (2020)] proposed Modified Maxwell (ModMax) model of nonlinear duality-invariant conformal electrodynamics. Here, Generalized ModMax (GenModMax) model of…

General Physics · Physics 2022-03-23 S. I. Kruglov