A comparison of approximate gravitational lens equations and a proposal for an improved new one [PDF]
Phys.Rev.D78:103005,2008, 2008 Keeping the exact general relativistic treatment of light bending as a reference, we compare the accuracy of commonly used approximate lens equations. We conclude that the best approximate lens equation is the Ohanian lens equation, for which we present a new expression in terms of distances between observer, lens and source planes.
A. O. Petters +6 more
arxiv +5 more sources
Fixed points of mapping of N-point gravitational lenses [PDF]
Odessa Astronomical Publications, 2018 In this paper, we study fixed points of N-point gravitational lenses. We use complex form of lens mapping to study fixed points. Complex form has an advantage over coordinate one because we can describe N-point gravitational lens by system of two equation ...
A. T. Kotvytskiy +2 more
doaj +2 more sources
A Systematic Review of Strong Gravitational Lens Modeling Software [PDF]
, 2012 Despite expanding research activity in gravitational lens modeling, there is no particular software which is considered a standard. Much of the gravitational lens modeling software is written by individual investigators for their own use. Some gravitational lens modeling software is freely available for download but is widely variable with regard to ...
Aazami +39 more
arxiv +3 more sources
The Optimal Gravitational Lens Telescope [PDF]
J. Surdej et al 2010 The Astronomical Journal 139 1935, 2010 Given an observed gravitational lens mirage produced by a foreground deflector (cf. galaxy, quasar, cluster,...), it is possible via numerical lens inversion to retrieve the real source image, taking full advantage of the magnifying power of the cosmic lens. This has been achieved in the past for several remarkable gravitational lens systems.
Bolton +15 more
arxiv +7 more sources
The cosmological lens equation and the equivalent single-plane gravitational lens [PDF]
, 1997 The gravitational lens equation resulting from a single (non-linear) mass concentration (the main lens) plus inhomogeneities of the large-scale structure is shown to be strictly equivalent to the single-plane gravitational lens equation without the cosmological perturbations.
Schneider, Peter
arxiv +5 more sources
Scattering of Gravitational Waves by the Weak Gravitational Fields of Lens Objects [PDF]
, 2005 We consider the scattering of the gravitational waves by the weak gravitational fields of lens objects. We obtain the scattered gravitational waveform by treating the gravitational potential of the lens to first order, i.e. using the Born approximation.
Bartelmann +13 more
arxiv +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 +2 more sources
Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow [PDF]
Universe, 2017 In this article, we present an overview of the new developments in problems of the plasma influence on the effects of gravitational lensing, complemented by pieces of new material and relevant discussions.
Gennady S. Bisnovatyi-Kogan +1 more
doaj +2 more sources
Unveiling the Mysteries of the Chinese lens zonule balance tension: A statistical analysis [PDF]
HeliyonBackground: This study aims to provide an estimated dataset of lens zonule balance tension (LZBT) measurements in cataractous lenses among Chinese patients and to conduct a statistical analysis of anterior segment parameters.
Lujie Zhang +7 more
doaj +2 more sources
On the Possibility of Determining Hubble's Parameter and the Masses of Galaxies from the Gravitational Lens Effect [PDF]
, 1964 S. Refsdal
openalex +2 more sources