Light deflection and Gauss–Bonnet theorem: definition of total deflection angle and its applications
Sign Up to like & getrecommendations! Published in 2017 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-018-2368-2
Abstract: In this paper, we re-examine the light deflection in the Schwarzschild and the Schwarzschild–de Sitter spacetime. First, supposing a static and spherically symmetric spacetime, we propose the definition of the total deflection angle $$\alpha $$α… read more here.
Keywords: deflection; total deflection; geometry; mathscr ... See more keywords
The mechanism for the coupler and draft gear and its influence on safety during a train collision
Sign Up to like & getrecommendations! Published in 2018 at "Vehicle System Dynamics"
DOI: 10.1080/00423114.2017.1413198
Abstract: ABSTRACT A mechanical model of the coupler and draft gear was established to study the mechanism during an intercity train collision. The model includes four rigid bodies, one spherical joint, two nonlinear torsion spring units… read more here.
Keywords: collision; train; coupler; deflection angle ... See more keywords
The optical geometry definition of the total deflection angle of a light ray in curved spacetime
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/08/028
Abstract: Assuming a static and spherically symmetric spacetime, we propose a novel concept of the total deflection angle of a light ray in terms of the optical geometry which is the Riemannian geometry experienced by the… read more here.
Keywords: total deflection; geometry; light ray; deflection angle ... See more keywords
Deflection angle and lensing signature of covariant ????(????) gravity
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/10/062
Abstract: We calculate the deflection angle, as well as the positions and magnifications of the lensed images, in the case of covariant f(T) gravity. We first extract the spherically symmetric solutions for both the pure-tetrad and… read more here.
Keywords: covariant gravity; deflection; general relativity; signature ... See more keywords
Effect of the hair on deflection angle by asymptotically flat black holes in Einstein-Maxwell-dilaton theory
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.044052
Abstract: In this paper, we are interested in a model of exact asymptotically flat charged hairy black holes in the background of a dilaton potential. We study the weak gravitational lensing in the spacetime of a… read more here.
Keywords: deflection angle; hairy black; black holes; dilaton ... See more keywords
Gravitational deflection angle of light: Definition by an observer and its application to an asymptotically nonflat spacetime
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.104032
Abstract: The gravitational deflection angle of light for an observer and source at finite distance from a lens object has been studied by Ishihara et al. [Phys. Rev. D, 94, 084015 (2016)], based on the Gauss-Bonnet… read more here.
Keywords: deflection; definition observer; angle light; angle ... See more keywords
Effect of the cosmological constant on the deflection angle by a rotating cosmic string
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.97.064030
Abstract: In this article, we report the effect of the cosmological constant and the internal density energy of the cosmic string in the deflection angle of light in the spacetime of a rotating cosmic string with… read more here.
Keywords: cosmic string; rotating cosmic; string; deflection angle ... See more keywords
Mean scattering angle method for direct simulation Monte Carlo.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.015302
Abstract: In order to predict the postcollision velocities in the binary collision, one needs the deflection angle given by the solution of the trajectory equation of classical mechanics. In the direct simulation Monte Carlo, it has… read more here.
Keywords: deflection; direct simulation; deflection angle; simulation ... See more keywords
A Novel Path Planning Algorithm Considering the Maximum Deflection Angle of Joint
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3105960
Abstract: The paper deals with a minimum potential energy algorithm considering the maximum deflection angle of joint (MPE-MDA algorithm) for three key factors including the maximum deflection angle of the joint, the total length of the… read more here.
Keywords: algorithm; deflection; path; maximum deflection ... See more keywords
Realization of inversely designed metagrating for highly efficient large angle beam deflection.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.454137
Abstract: Directional emission source is one of the key components for multiple-view three-dimensional display. It is hard to achieve high efficiency and large deflection angle direction sources via geometric optics due to the weak confinement of… read more here.
Keywords: deflection; large deflection; optics; deflection angle ... See more keywords
Effect of Aether Field on Weak Deflection Angle of Black Holes
Sign Up to like & getrecommendations! Published in 2019 at "Chinese Physics C"
DOI: 10.20944/preprints201908.0156.v1
Abstract: We study the light rays in a static and spherically symmetric gravitational field of null aether theory (NAT). To this end, we employ the Gauss-Bonnet theorem to compute the deflection angle by a NAT black… read more here.
Keywords: field; effect aether; deflection angle;