Results 1 to 10 of about 859,905 (265)
The strong gravitational lens finding challenge [PDF]
Astronomy & Astrophysics, 2019 Large-scale imaging surveys will increase the number of galaxy-scale strong lensing candidates by maybe three orders of magnitudes beyond the number known today. Finding these rare objects will require picking them out of at least tens of millions of images, and deriving scientific results from them will require quantifying the efficiency and bias of ...
Marc Huertas-Company +39 more
openaire +12 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
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.
Dimitri Mawet +11 more
arxiv +12 more sources
Gravitational lens candidates in the E-CDFS [PDF]
Astrophys.J.734:69,2011, 2011 We report ten lens candidates in the E-CDFS from the GEMS survey. Nine of the systems are new detections and only one of the candidates is a known lens system. For the most promising five systems including the known lens system, we present results from preliminary lens mass modelling, which tests if the candidates are plausible lens systems ...
Surhud More +7 more
arxiv +9 more sources
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.
V. Bozza
arxiv +3 more sources
GRAVITATIONAL LENS MODELING WITH BASIS SETS [PDF]
The Astrophysical Journal, 2015 14 pages, 10 figures, accepted for publication in ...
Simon Birrer +2 more
openaire +6 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
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
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
A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present the measurement of the Hubble constant, H0, with three strong gravitational lens systems. We describe a blind analysis of both PG 1115+080 and HE 0435−1223 as well as an extension of our previous analysis of RXJ 1131−1231.
G. Chen +22 more
semanticscholar +1 more source