Results 21 to 30 of about 797,854 (217)

SOME COROLLARY FACTS OF THE N-POINT GRAVITATIONAL LENS EQUATION IN A COMPLEX FORM

open access: yesOdessa Astronomical Publications, 2019
In the theory of the N-point gravita- tional lens equation, two groups of problems can be dis- tinguished. These are the so-called primal and inverse problems.
O. A. Osmayev   +3 more
doaj   +1 more source

Studies of relativistic effects with radioastron space mission [PDF]

open access: yesSerbian Astronomical Journal, 2007
In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj   +1 more source

GRAVITATIONAL LENS MODELING WITH BASIS SETS [PDF]

open access: yes, 2015
We present a strong lensing modeling technique based on versatile basis sets for the lens and source planes. Our method uses high performance Monte Carlo algorithms, allows for an adaptive build up of complexity, and bridges the gap between parametric ...
S. Birrer, A. Amara, A. Réfrégier
semanticscholar   +1 more source

Detection of the Gravitational Lens Magnifying a Type Ia Supernova [PDF]

open access: yesScience, 2014
Magnified Flare-Up The rise and fall of the luminosity of a supernova detected in 2010 was typical for its class, but its apparent brightness was 30 times greater than similar events. Quimby et al. (p.
R. Quimby   +10 more
semanticscholar   +1 more source

CORRELATION OF THE NUMBER OF IMAGES OF AN N-POINT GRAVITATIONAL LENS AND THE NUMBER OF SOLUTIONS OF ITS SYSTEM

open access: yesOdessa Astronomical Publications, 2017
In this paper, we study the correlation between the number of solutions of a system of lens equations and the number of source images that a gravitational lens has. We defined the concept of an image in a gravitational lens.
A. T. Kotvytskiy   +2 more
doaj   +1 more source

Space Warps II. New gravitational lens candidates from the CFHTLS discovered through citizen science [PDF]

open access: yes, 2015
We report the discovery of 29 promising (and 59 total) new lens candidates from the CFHT Legacy Survey (CFHTLS) based on about 11 million classifications performed by citizen scientists as part of the first Space Warps lens search.
A. More   +20 more
semanticscholar   +1 more source

Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow [PDF]

open access: yes, 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.
G. Bisnovatyi-Kogan, O. Tsupko
semanticscholar   +1 more source

Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions

open access: yesNature Communications, 2019
Quantum metrology allows surpassing the standard quantum limit, but methods relying on squeezing require to know the orientation of the squeezed quadrature with respect to the signal.
Fabian Wolf   +8 more
doaj   +1 more source

Theory of gravitational lensing on a curved cosmic string

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
It is discussed in detail the complete mathematical model of gravitational lensing on a single cosmic string (CS) of general shape and position with respect to the line of sight.
Igor I. Bulygin   +2 more
doaj   +1 more source

Detection of substructure with adaptive optics integral field spectroscopy of the gravitational lens B1422+231 [PDF]

open access: yes, 2014
Strong gravitational lenses can be used to detect low mass subhalos, based on deviations in image fluxes and positions from what can be achieved with a smooth mass distribution.
A. Nierenberg   +4 more
semanticscholar   +1 more source

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