文献类型：期刊文献

英文题名：Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole Spacetime

作者：Filho, A.A. Araújo[1,2]; Heidari, N.[3,4]; Lobo, Iarley P.[2,5]; Shi, Yuxuan[6]

机构：[1] Departamento de Física, Universidade Federal da Paraíba, Caixa Postal 5008, Paraíba, Jo?o Pessoa, 58051-970, Brazil; [2] Departamento de Física, Universidade Federal de Campina Grande, Caixa Postal 10071, Paraíba, Campina Grande, 58429-900, Brazil; [3] Center for Theoretical Physics, Khazar University, 41 Mehseti Street, Baku, AZ-1096, Azerbaijan; [4] School of Physics, Damghan University, Damghan, 3671641167, Iran; [5] Department of Chemistry and Physics, Federal University of Paraíba, Rodovia BR 079 - km 12, Areia, 58397-000, Brazil; [6] Department of Physics, East China University of Science and Technology, Shanghai, 200237, China

年份：2025

外文期刊名：arXiv

收录：EI(收录号：20250433435)

语种：英文

外文关键词：Black holes - Gravitation - Topology

摘要：This work investigates additional gravitational features of a newly proposed black hole spacetime within Kalb–Ramond gravity, incorporating non–commutative corrections arising from a gauge–theoretic approach recently introduced in the literature [arXiv:2507.17390]. Accordingly, null geodesics are solved numerically to trace photon paths; the photon sphere and shadow are determined. From Event Horizon Telescope (EHT) measurements of SgrA?, constraints on the parameters Θ (which encapsulates the non–commutativity) and (the Lorentz–violating parameter) are established. To examine the stability of critical orbits and the deflection angle (gravitational lensing) in the weak field scenario, we compute the Gaussian curvature in order to use the Gauss–Bonnet theorem. Moreover, the deflection angle has been calculated as well in the strong deflection limit. Furthermore, Lensing observables are estimated using EHT data for SgrA? and M87. Topological features such as the topological photon sphere are also explored. Copyright ? 2025, The Authors. All rights reserved.