Results 11 to 20 of about 33,597 (156)
Generalised model-independent characterisation of strong gravitational lenses [PDF]
Astronomy & Astrophysics, 2018 Based on the standard gravitational lensing formalism with its effective, projected lensing potential in a given background cosmology, we investigated under which transformations of the source position and of the deflection angle the observable properties of the multiple images remain invariant.
Wagner, Jenny
openaire +6 more sources
Particle dark matter searches in the anisotropic sky [PDF]
Frontiers in Physics, 2014 Anisotropies in the electromagnetic emission produced by dark matter annihilation or decay in the extragalactic sky are a recent tool in the quest for a particle dark matter evidence.
Nicolao eFornengo +3 more
doaj +4 more sources
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 ...
P. Fleury, J. Larena, J. Uzan
semanticscholar +4 more sources
Exploring Weak Gravitational Lensing Effects by a Regular Black Hole
Spektra: Jurnal Fisika dan AplikasinyaGravitational lensing is one of the physical consequences of Einstein’s general theory of relativity, which has been observationally confirmed. This work aims to study the weak gravitational lensing scenario where the lens is a spherically symmetric ...
A. K. Durrani, H. S. Ramadhan
doaj +2 more sources
Strong gravitational lensing in Horndeski theory of gravity [PDF]
Physical Review D, 2023 In this paper we build the general formalism of gravitational lensing in luminal Horndeski theories, deriving the Jacobi matrix equation and the general angular diameter distance in these theories through the screen space formalism.
P. Bessa
semanticscholar +1 more source
Consistent clustering and lensing of SDSS-III BOSS galaxies with an extended abundance matching formalism [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Several analyses have shown that ΛCDM-based models cannot jointly describe the clustering (GC) and galaxy-galaxy lensing (GGL) of galaxies in the SDSS-III BOSS survey, which is commonly known as the “lensing-is-low problem”.
S. Contreras +2 more
semanticscholar +1 more source
Prospects of testing late-time cosmology with weak lensing of gravitational waves and galaxy surveys [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 We investigate the synergy of upcoming galaxy surveys and gravitational wave (GW) experiments in constraining late-time cosmology, examining the cross-correlations between the weak lensing of gravitational waves (GW-WL) and the galaxy fields.
Anna Balaudo +4 more
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
Strong gravitational lensing by rotating Simpson-Visser black holes [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 We investigate strong field gravitational lensing by rotating Simpson-Visser black hole, which has an additional parameter (0 ≤ l/2M ≤ 1), apart from mass (M) and rotation parameter (a).
Shafqat Ul Islam +2 more
semanticscholar +1 more source
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