Zobrazeno 1 - 10
of 171 551
pro vyhledávání: '"NEWMAN, A. P."'
We study the null geodesics in the extremal Kerr-Newman exterior. We clarify the roots of the radial potential and obtain the parameter space of the azimuthal angular momentum and the Carter constant of the light rays for varieties of the orbits. It
Externí odkaz:
http://arxiv.org/abs/2411.00458
We address a specific issue of the Newman-Janis algorithm: determining the general form of the complex transformation for the Schwarzschild metric and ensuring that the resulting axisymmetric metric satisfies the Ricci-flat condition. We address a sp
Externí odkaz:
http://arxiv.org/abs/2410.02178
Autor:
Jizba, Petr, Mudruňka, Kamil
We study the exterior solution for a static, spherically symmetric source in Weyl conformal gravity in terms of the Newman--Penrose formalism. We first show that both the static, uncharged black hole solution of Mannheim and Kazanas and the static, c
Externí odkaz:
http://arxiv.org/abs/2409.08344
The gravitational deflection of light signals restricted in the polar-axis plane of a moving Kerr-Newman (KN) black hole with a constant velocity along the polar axis is studied within the second post-Minkowskian (PM) approximation. For this purpose,
Externí odkaz:
http://arxiv.org/abs/2411.03808
Autor:
Chen, Wen-Xiang, Zheng, Yao-Guang
This paper demonstrates the validity of the first law of horizon thermodynamics for Schwarzschild, RN, Kerr, and Kerr-Newman (KN) black holes within the framework of four-dimensional f(R) gravity coupled with dual scalar fields. Starting from a five-
Externí odkaz:
http://arxiv.org/abs/2410.20069
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
The possible existence of axions in the universe introduces the intriguing possibility of photon-axion conversion in strong magnetic fields, particularly near compact objects like supermassive black holes or even naked singularity. In this study, we
Externí odkaz:
http://arxiv.org/abs/2409.09802
We study the quantum Newman-Moore model, or quantum triangular plaquette model (qTPM), in the presence of a longitudinal field (qTPMz). We present evidence that indicates that the ground state phase diagram of the qTPMz includes various frustrated ph
Externí odkaz:
http://arxiv.org/abs/2409.09235
Recent studies have demonstrated that a scalar field non-minimally coupled to the electromagnetic field can experience a spin-induced tachyonic instability near Kerr-Newman black holes, potentially driving the formation of scalar clouds. In this pape
Externí odkaz:
http://arxiv.org/abs/2409.04458