Results 41 to 50 of about 841,753 (381)
Gravitational Lensing by Spherical Lenses [PDF]
International Journal of Astronomy and Astrophysics, 2014 In this work we introduced a new proposal to study the gravitational lensing theory by spherical lenses, starting from its surface mass density $ (x)$ written in terms of a decreasing function $f$ of a dimensionless coordinate $x$ on the lens plane.
Roger Hurtado +2 more
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A Highly Magnified Gravitationally Lensed Red QSO at z = 2.5 with a Significant Flux Ratio Anomaly
The Astrophysical Journal, 2023 We present the discovery of a gravitationally lensed dust-reddened QSO at z = 2.517, identified in a survey for QSOs by infrared selection. Hubble Space Telescope imaging reveals a quadruply lensed system in a cusp configuration, with a maximum image ...
Eilat Glikman +14 more
doaj +1 more source
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
KiDS-1000 catalogue: Weak gravitational lensing shear measurements [PDF]
Astronomy & Astrophysics, 2020 We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging.
B. Giblin +21 more
semanticscholar +1 more source
Gravitational lensing by gravitational waves [PDF]
Gravitation and Cosmology, 2008 9 pages, 3 ...
O. Yu. Tsupko +4 more
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Circular orbit of a particle and weak gravitational lensing [PDF]
Physical Review D, 2020 The purpose of this paper is twofold. First, we introduce a geometric approach to study the circular orbit of a particle in static and spherically symmetric spacetime based on Jacobi metric.
Zonghai Li, Guodong Zhang, A. Övgün
semanticscholar +1 more source
Phase effects from strong gravitational lensing of gravitational waves [PDF]
Physical Review D, 2020 Assessing the probability that two or more gravitational wave (GW) events are lensed images of the same source requires an understanding of the properties of the lensed images.
J. Ezquiaga +4 more
semanticscholar +1 more source
Exploring gravitational lensing [PDF]
European Journal of Physics, 2019 In this article, we discuss the idea of gravitational lensing, from a systematic, historical and didactic point of view. We show how the basic lensing equation together with the concepts of geometrical optics opens a space of implications that can be explored along different dimensions.
Tilman Sauer, Tobias Schütz
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Testing Velocity-field Lensing on IllustrisTNG Galaxies
The Astrophysical Journal, 2023 Weak gravitational lensing shear could be measured far more precisely if information about unlensed attributes of source galaxies were available. Disk galaxy velocity fields supply such information, at least in principle, with idealized models predicting
Jean Donet, David Wittman
doaj +1 more source
Rotation in gravitational lenses [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Gravitational lensing deflects light. A single lens deflector can only shear images, but cannot induce rotations. Multiple lens planes can induce rotations. Such rotations can be observed in quadruply imaged sources, and can be used to distinguish between two proposed solutions of the flux anomaly problem: substructures in lensing galaxies vs large ...
Shude Mao, Ue-Li Pen
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