Results 41 to 50 of about 93,016 (319)
Can we see a rotating gravitational lens? [PDF]
Prog.Theor.Phys. 104 (2000) 95-102, 2000 It is known that the rotation of a gravitational lens affects properties of images. We consider an inverse problem: If the lens is dark, can we infer its rotation from the observed images? We find that, up to the first order in the gravitational constant G, a rotating lens is not distinguishable from a non-rotating one.
arxiv +1 more source
GRAVITATIONAL LENS MODELING WITH BASIS SETS [PDF]
The Astrophysical Journal, 2015 14 pages, 10 figures, accepted for publication in ...
Simon Birrer +2 more
openaire +4 more sources
Gravitational lensing by exotic objects [PDF]
Mod. Phys. Lett. A, 32, 1730031 (2017), 2017 This paper reviews a phenomenological approach to the gravitational lensing by exotic objects such as the Ellis wormhole lens, where exotic lens objects may follow a non-standard form of the equation of state or may obey a modified gravity theory. A gravitational lens model is proposed in the inverse powers of the distance, such that the Schwarzschild ...
arxiv +1 more source
‘Missing image’ in gravitational lens systems? [PDF]
Nature, 1986 The gravitational lens models involving extended mass distribution generally predict an odd number of images with one of the images close to the centre of the principal lensing galaxy. In all the observed lens systems only an even number of images have been unambigously detected so far.
S. M. Chitre +2 more
openaire +3 more sources
Particle saltation trajectories in supercritical open channel flows: Roughness effect
Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3588-3610, December 2022., 2022 This study investigates single particle trajectories in supercritical open channel flows under different hydraulic and roughness conditions. Therefore, it helps to get a better understanding on the mechanics and prediction of bedrock incision and hydro‐abrasion occurring in steep bedrock rivers and hydraulic structures.
Dila Demiral +3 more
wiley +1 more source
Self-consistent gravitational lens reconstruction [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We present a new method for directly determining accurate, self-consistent cluster lens mass and shear maps in the strong lensing regime from the magnification bias of background galaxies. The method relies upon pixellisation of the surface mass density distribution which allows us to write down a simple, solvable set of equations.
Andy Taylor, Simon Dye
openaire +3 more sources
Gravitational Lens Time Delays Using Polarization Monitoring
Galaxies, 2017 Gravitational lens time delays provide a means of measuring the expansion of the Universe at high redshift (and therefore in the ‘Hubble flow’) that is independent of local calibrations.
Andrew Biggs, Ian Browne
doaj +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
CTQ 414: A New Gravitational Lens [PDF]
The Astronomical Journal, 1999 Latex, 18 pages including 2 ps figures; accepted for publication in ...
Morgan, Nicholas D. +4 more
openaire +3 more sources
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