Results 21 to 30 of about 34,931 (162)
Line-of-sight effects in strong gravitational lensing [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 While most strong-gravitational-lensing systems may be roughly modelled by a single massive object between the source and the observer, in the details all the structures near the light path contribute to the observed images.
P. Fleury, J. Larena, J. Uzan
semanticscholar +1 more source
Modified gravitational wave propagation with higher modes and its degeneracies with lensing [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 Low-energy alternatives to General Relativity (GR) generically modify the phase of gravitational waves (GWs) during their propagation. As detector sensitivities increase, it becomes key to understand how these modifications affect the GW higher modes and
J. Ezquiaga +4 more
semanticscholar +1 more source
Galaxy-scale Test of General Relativity with Strong Gravitational Lensing [PDF]
Astrophysical Journal, 2021 Although general relativity (GR) has been precisely tested at the solar system scale, precise tests at a galactic or cosmological scale are still relatively insufficient.
Xiaohong Liu +3 more
semanticscholar +1 more source
Recursion relations for gravitational lensing [PDF]
General Relativity and Gravitation, 2020 The weak gravitational lensing formalism can be extended to the strong lensing regime by integrating a nonlinear version of the geodesic deviation equation.
B. D. Normann, C. Clarkson
semanticscholar +2 more sources
Journal of High Energy Physics, 2020 We investigate the possible existence of graviballs, a system of bound gravitons, and show that two gravitons can be bound together by their gravitational interaction.
B. Guiot, A. Borquez, A. Deur, K. Werner
doaj +1 more source
Global properties of gravitational lens maps in a Lorentzian manifold setting [PDF]
, 2000 In a general-relativistic spacetime (Lorentzian manifold), gravitational lensing can be characterized by a lens map, in analogy to the lens map of the quasi-Newtonian approximation formalism.
Perlick, Volker
core +3 more sources
Light bending and gravitational lensing in Brans-Dicke theory
Physics Letters B, 2019 As an important candidate theory of gravity, Brans-Dicke theory has been widely studied. In this paper, we investigate light bending and gravitational lensing by compact objects in Brans-Dicke theory in weak gravitational field.
Xiaojun Gao, Shupeng Song, Jinsong Yang
doaj +1 more source
Fortschritte der Physik, Volume 71, Issue 8-9, September 2023., 2023 Abstract The momentum and Hamiltonian constraints of vacuum Einstein equations, within the Bowen‐York formalism, for two interacting black holes in close separation, with anti‐parallel spins and anti‐parallel linear momenta is studied. An analytical solution using perturbation theory is given.
Emel Altas, Emine Ertugrul, Bayram Tekin
wiley +1 more source
Advanced Photonics Research, Volume 4, Issue 7, July 2023., 2023 Combined with the polarization state of light, orbital angular momentum (OAM) can be utilized as a degree of freedom to selectively excite the desired multipoles in nanoparticles. Different scattering characteristics of the excited modes result in interesting features in the imparted optical forces which is of importance in various applications ...
Mohammad Mojtaba Sadafi +3 more
wiley +1 more source
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