Zobrazeno 1 - 10
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pro vyhledávání: '"Filho, A. A. Araújo"'
Autor:
Filho, A. A. Araújo
In this work, we investigate the gravitational signatures of a static nonlinear electromagnetic extension of the Kerr-Newman solution. We conduct an analysis of light propagation, focusing on the photon sphere, shadow formation, and geodesic trajecto
Externí odkaz:
http://arxiv.org/abs/2410.12060
In this work, we investigate the signatures of black holes within an effective quantum gravity framework recently proposed in the literature [1] . We begin by outlining the general setup, highlighting the two distinct models under consideration. This
Externí odkaz:
http://arxiv.org/abs/2410.08246
In this work, we analyze various phenomena influenced by the gravitational field in a bumblebee gravity solution, with a particular emphasis on a traversable wormhole for massless particle modes. Specifically, we calculate the index of refraction, gr
Externí odkaz:
http://arxiv.org/abs/2409.17351
In this work, we explore a gravitational non-commutative black hole by gauging the de Sitter SO(4,1) group and employing the Seiberg-Witten map. Specifically, we examine modifications of non-commutativity represented through mass deformation. Initial
Externí odkaz:
http://arxiv.org/abs/2409.03566
In this work, we obtain estimates for the upper bound of gaps between consecutive eigenvalues for the eigenvalue problem of a class of second-order elliptic differential operators in divergent form, with Dirichlet boundary conditions, in a limited do
Externí odkaz:
http://arxiv.org/abs/2408.05068
In this study, we explore a spherically symmetric charged black hole with a cosmological constant under the influence of a Kalb--Ramond field background. We compute the photon sphere and shadow radii, validating our findings using observational data
Externí odkaz:
http://arxiv.org/abs/2408.03090
In this work, we investigate a spherically symmetric charged black hole in the presence of a Kalb--Ramond field background. We calculate the photon sphere and shadow radii and, corroborating our results, we constrain them from observational data from
Externí odkaz:
http://arxiv.org/abs/2407.07017
In this work, we explore a Schwarzschild-like black hole within the framework of metric--affine bumblebee gravity. First, we investigate the behavior of the Kretschmann scalar and singularities in this modified gravity approach. Next, we introduce a
Externí odkaz:
http://arxiv.org/abs/2407.05321
Publikováno v:
Physics of the Dark Universe, 2024, 101630
In this study, we investigate the signatures of a non-commutative black hole solution. Initially, we calculate the thermodynamic properties of the system, including entropy, heat capacity, and Hawking radiation. For the latter quantity, we employ two
Externí odkaz:
http://arxiv.org/abs/2406.12015
Autor:
Filho, A. A. Araújo
In this work, we investigate the gravitational lensing of a charged black hole (spherically symmetric) within the context of Lorentz violation triggered by an antisymmetric tensor field. Our calculations consider two different scenarios: the weak and
Externí odkaz:
http://arxiv.org/abs/2406.11582