IMAGES DISTRIBUTION OF BINARY SYMMETRICAL GRAVITATIONAL LENS
Odessa Astronomical Publications, 2019 In this paper, we study the distribu- tion of images from a point source in N - point gravi- tational lenses. It is well known that in a Schwarzschild lens (N = 1) from a point source, there are always two images.
A. T. Kotvytskiy +2 more
doaj +1 more source
Gravitational lensing shear by an exotic lens object with negative convergence or negative mass [PDF]
, 2013 Gravitational lens models with negative convergence (surface mass density projected onto the lens plane) inspired by modified gravity theories, exotic matter and energy have been recently discussed in such a way that a static and spherically-symmetric ...
K. Izumi +4 more
semanticscholar +1 more source
QUASI-ANALYTICAL METHOD FOR IMAGES CONSTRUCTION FROM GRAVITATIONAL LENSES
Odessa Astronomical Publications, 2016 One of the main problems in the study of system of equations of the gravitational lens, is the computation of coordinates from the known position of the source. In the process of computing finds the solution of equations with two unknowns. The problem is
A. T. Kotvytskiy, S. D. Bronza
doaj +1 more source
DISSECTING THE GRAVITATIONAL LENS B1608+656. II. PRECISION MEASUREMENTS OF THE HUBBLE CONSTANT, SPATIAL CURVATURE, AND THE DARK ENERGY EQUATION OF STATE [PDF]
, 2009 Strong gravitational lens systems with measured time delays between the multiple images provide a method for measuring the “time-delay distance” to the lens, and thus the Hubble constant.
S. Suyu +10 more
semanticscholar +1 more source
Lensing Magnification Seen by Gravitational Wave Detectors
Universe, 2021 In this paper, we studied the gravitational lensing of gravitational wave events. The probability that an observed gravitational wave source has been (de-)amplified by a given amount is a detector-dependent quantity which depends on different ingredients:
Giulia Cusin, Ruth Durrer, Irina Dvorkin
doaj +1 more source
Auto-detection of strong gravitational lenses using convolutional neural networks
Emergent Scientist, 2018 We propose a method for the automated detection of strong galaxy-galaxy gravitational lenses in images, utilising a convolutional neural network (CNN) trained on 210 000 simulated galaxy-galaxy lens and non-lens images.
Pearson James +2 more
doaj +1 more source
Exploring Quantum Geometry Created by Quantum Matter
Physics, 2022 Exactly soluble models can serve as excellent tools to explore conceptual issues in non-perturbative quantum gravity. In perturbative approaches, it is only the two radiative modes of the linearized gravitational field that are quantized.
Abhay Ashtekar
doaj +1 more source
IMPROVED CONSTRAINTS ON THE GRAVITATIONAL LENS Q0957+561. II. STRONG LENSING [PDF]
, 2009 We present a detailed strong lensing analysis of a Hubble Space Telescope/Advanced Camera for Surveys legacy data set for the first gravitational lens, Q0957+561.
R. Fadely +3 more
semanticscholar +1 more source
DISSECTING THE GRAVITATIONAL LENS B1608+656. I. LENS POTENTIAL RECONSTRUCTION [PDF]
, 2008 Strong gravitational lensing is a powerful technique for probing galaxy mass distributions and for measuring cosmological parameters. Lens systems with extended source-intensity distributions are particularly useful for this purpose since they provide ...
S. Suyu +10 more
semanticscholar +1 more source
Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens
Advanced Photonics ResearchThe celebrated theory of general relativity has inspired research on optical simulations using artificial microstructures to mimic curved space–times.
Jun‐Liang Duan +5 more
doaj +1 more source