Fixed points of mapping of N-point gravitational lenses
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
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On the density profile of dark matter substructure in gravitational lens galaxies [PDF]
, 2014 We consider three extensions of the Navarro, Frenk and White (NFW) profile and investigate the intrinsic degeneracies among the density profile parameters on the gravitational lensing effect of satellite galaxies on highly magnified Einstein rings.
S. Vegetti, Mark Vogelsberger Mpa, Mit
semanticscholar +1 more source
Adaptive semi-linear inversion of strong gravitational lens imaging [PDF]
, 2014 We present a new pixelized method for the inversion of gravitationally lensed extended source images which we term adaptive semi-linear inversion (SLI). At the heart of the method is an h-means clustering algorithm which is used to derive a source plane ...
J. Nightingale, S. Dye
semanticscholar +1 more source
High Resolution Gravitational Lens Model
Open Astronomy, 2015 A new model of gravitational lens – high-resolution gravitational lens based on the metric of gravitational field produced by N moving and rotating finite-sized bodies – is proposed. The model is applied to the case of a double galaxy gravitational lens.
Chechin L. M.
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THE ANALYSIS OF IMAGES OF A CIRCULAR SOURCE IN N-POINT GRAVITATIONAL LENSES
Odessa Astronomical Publications, 2018 Currently, in the field of computer processing, there are difficulties. When processing astrophysical experimental data, the difficulties are connected, on the one hand, with a large amount of information that requires processing, and, on the other hand,
S. D. Bronza +2 more
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MOA-2020-BLG-208Lb: Cool Sub-Saturn-mass Planet within Predicted Desert
The Astronomical Journal, 2023 We analyze the MOA-2020-BLG-208 gravitational microlensing event and present the discovery and characterization of a new planet, MOA-2020-BLG-208Lb, with an estimated sub-Saturn mass.
Greg Olmschenk +82 more
doaj +1 more source
Chitah: STRONG-GRAVITATIONAL-LENS HUNTER IN IMAGING SURVEYS [PDF]
, 2014 Strong gravitationally lensed quasars provide powerful means to study galaxy evolution and cosmology. Current and upcoming imaging surveys will contain thousands of new lensed quasars, augmenting the existing sample by at least two orders of magnitude ...
J. Chan +7 more
semanticscholar +1 more source
COSMOLOGY FROM GRAVITATIONAL LENS TIME DELAYS AND PLANCK DATA [PDF]
, 2013 Under the assumption of a flat ΛCDM cosmology, recent data from the Planck satellite point toward a Hubble constant that is in tension with that measured by gravitational lens time delays and by the local distance ladder.
S. Suyu +14 more
semanticscholar +1 more source
GRAVITATIONAL LENS MODELS BASED ON SUBMILLIMETER ARRAY IMAGING OF HERSCHEL-SELECTED STRONGLY LENSED SUB-MILLIMETER GALAXIES AT z > 1.5 [PDF]
, 2013 Strong gravitational lenses are now being routinely discovered in wide-field surveys at (sub-)millimeter wavelengths. We present Submillimeter Array (SMA) high-spatial resolution imaging and Gemini-South and Multiple Mirror Telescope optical spectroscopy
R. Bussmann +55 more
semanticscholar +1 more source
THE BOSS EMISSION-LINE LENS SURVEY. II. INVESTIGATING MASS-DENSITY PROFILE EVOLUTION IN THE SLACS+BELLS STRONG GRAVITATIONAL LENS SAMPLE [PDF]
, 2012 We present an analysis of the evolution of the central mass-density profile of massive elliptical galaxies from the SLACS and BELLS strong gravitational lens samples over the redshift interval z ≈ 0.1–0.6, based on the combination of strong-lensing ...
A. Bolton +10 more
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