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Weak Gravitational Lensing of Finite Beams [PDF]
Physical Review Letters, 2017 The standard theory of weak gravitational lensing relies on the infinitesimal light beam approximation. In this context, images are distorted by convergence and shear, the respective sources of which unphysically depend on the resolution of the ...
Pierre Fleury +2 more
semanticscholar +10 more sources
Weak gravitational lensing by voids [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We consider the prospects for detecting weak gravitational lensing by underdensities (voids) in the large-scale matter distribution. We derive the basic expressions for magnification and distortion by spherical voids. Clustering of the background sources
Luca Amendola, J. Frieman, I. Waga
core +6 more sources
Weak gravitational lensing with deimos [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We introduce a novel method for weak-lensing measurements, which is based on a mathematically exact deconvolution of the moments of the apparent brightness distribution of galaxies from the telescope's PSF.
P. Melchior +3 more
core +10 more sources
The gravitational bending of acoustic Schwarzschild black hole [PDF]
European Physical Journal C: Particles and Fields, 2023 Acoustic black hole is becoming an attractive topic in recent years, for it open-up new direction for experimental/observational explorations of black holes.
Chen-Kai Qiao, Mi Zhou
doaj +2 more sources
Shadow revisiting and weak gravitational lensing with Chern-Simons modification [PDF]
Physics Letters B, 2023 Dynamical Chern-Simons (dCS) gravity has been attracting plenty of attentions due to the fact that it is a parity-violating modified theory of gravity that corresponds to a well-posed effective field theory in weak coupling approximation.
Yuan Meng +3 more
doaj +2 more sources
Weak gravitational lensing Schwarzschild-MOG black hole in plasma
European Physical Journal C: Particles and Fields, 2021 This paper is devoted to study weak gravitational lensing properties around black hole surrounded plasma medium in modified gravity (MOG). We have investigated the effects of the MOG-parametr and plasma medium on the deflection angle and total ...
Farruh Atamurotov +2 more
doaj +2 more sources
Power Spectrum Covariance of Weak Gravitational Lensing [PDF]
, 2001 Weak gravitational lensing observations probe the spectrum and evolution of density fluctuations and the cosmological parameters which govern them. At low redshifts, the non-linear gravitational evolution of large scale structure produces a non-Gaussian ...
Asantha Cooray, Wayne Hu
openalex +4 more sources
Gravitational lensing around Kehagias–Sfetsos compact objects surrounded by plasma
European Physical Journal C: Particles and Fields, 2019 We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter $$\omega _{_{KS}}$$ ωKS , in the presence of plasma, considering its homogeneous or power-law density distribution.
Sudipta Hensh +3 more
doaj +3 more sources
Weak deflection gravitational lensing for photons coupled to Weyl tensor in a Schwarzschild black hole [PDF]
European Physical Journal C: Particles and Fields, 2018 Beyond the Einstein–Maxwell model, electromagnetic field might couple with gravitational field through the Weyl tensor. In order to provide one of the missing puzzles of the whole physical picture, we investigate weak deflection lensing for photons ...
Wei-Guang Cao, Yi Xie
doaj +2 more sources
Effect of the Brane-Dicke coupling parameter on weak gravitational lensing by wormholes and naked singularities [PDF]
Physical Review D, 2019 In this paper, we analyze the deflection angle of light by Brane-Dicke wormhole in the weak field limit approximation to find the effect of the Brane-Dicke coupling parameter on the weak gravitation lensing.
Wajiha Javed, Rimsha Babar, Ali Övgün
openalex +3 more sources