Results 31 to 40 of about 34,517 (164)
Parameters estimation and strong gravitational lensing of nonsingular Kerr-Sen black holes [PDF]
, 2020 The recent time witnessed a surge of interest in strong gravitational lensing by black holes is due to the Event Horizon Telescope (EHT) results, which suggest comparing the black hole lensing in both general relativity and heterotic string theory.
Sushant G. Ghosh +2 more
semanticscholar +1 more source
World society and field theory: The infiltration of development into humanitarianism
The British Journal of Sociology, Volume 73, Issue 2, Page 402-420, March 2022., 2022 Abstract Differentiated modern society is commonly viewed as an aggregation of various fields, yet the question of their boundaries is often a silent one. This article builds on this lacuna to argue that cultural globalization should be acknowledged and added to the equation.
Nir Rotem
wiley +1 more source
Gravitational lensing by charged black hole in regularized 4D Einstein–Gauss–Bonnet gravity
European Physical Journal C: Particles and Fields, 2020 Among the higher curvature gravities, the most extensively studied theory is the so-called Einstein–Gauss–Bonnet (EGB) gravity, whose Lagrangian contains Einstein term with the GB combination of quadratic curvature terms, and the GB term yields ...
Rahul Kumar +2 more
doaj +1 more source
A Hamiltonian, post-Born, three-dimensional, on-the-fly ray tracing algorithm for gravitational lensing [PDF]
Journal of Cosmology and Astroparticle PhysicsThe analyses of the next generation cosmological surveys demand an accurate, efficient, and differentiable method for simulating the universe and its observables across cosmological volumes. We present Hamiltonian ray tracing (HRT) — the first post-Born (
Alana J Zhou +6 more
semanticscholar +1 more source
The Confrontation between General Relativity and Experiment [PDF]
Living Reviews in Relativity, 2014 Clifford M Will
exaly +2 more sources
Multiple imaging by gravitational waves [PDF]
, 1997 Gravitational waves act like lenses for the light propagating through them. This phenomenon is described using the vector formalism employed for ordinary gravitational lenses, which was proved to be applicable also to a non-stationary spacetime, with the
Braginsky V. B. +9 more
core +3 more sources
Gravitational lensing in a plasma from worldlines [PDF]
Physical Review DWe study the deflection of light rays in a cold, nonmagnetized plasma using the worldline framework. Starting from Synge’s Hamiltonian formalism, we construct a position-space action and use it perturbatively to calculate light bending angles.
F. Comberiati, Leonardo de la Cruz
semanticscholar +1 more source
Magnification relations for Kerr lensing and testing Cosmic Censorship [PDF]
, 2007 A Kerr black hole with mass parameter m and angular momentum parameter a acting as a gravitational lens gives rise to two images in the weak field limit.
A. O. Petters +6 more
core +1 more source
3D Weak Gravitational Lensing of the CMB and Galaxies [PDF]
, 2015 In this paper we present a power spectrum formalism that combines the full three-dimensional information from the galaxy ellipticity field, with information from the cosmic microwave background (CMB).
Das, S., Heavens, A. F., Kitching, T. D.
core +1 more source
An Exact Universal Gravitational Lensing Equation
, 1998 We first define what we mean by gravitational lensing equations in a general space-time. A set of exact relations are then derived that can be used as the gravitational lens equations in all physical situations.
A. Einstein +10 more
core +2 more sources