Results 11 to 20 of about 1,077 (214)
THE EFFECT OF ENVIRONMENT ON SHEAR IN STRONG GRAVITATIONAL LENSES [PDF]
The Astrophysical Journal, 2010 Accepted for publication in The Astrophysical Journal; 28 pages, 9 figures, 5 ...
Wong, Kenneth C. +4 more
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Topological defects in gravitational lensing shear fields [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 17 pages, 4 ...
Vitelli, Vincenzo +2 more
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MULTIPOLE FORMULAE FOR GRAVITATIONAL LENSING SHEAR AND FLEXION [PDF]
The Astrophysical Journal, 2009 ABSTRACT The gravitational lensing equations for convergence, potential, shear, and flexion are simple in polar coordinates and separate under a multipole expansion once the shear and flexion spinors are rotated into a “tangential” basis.
Bernstein, Gary M., Nakajima, Reiko
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Statistics of Extreme Gravitational Lensing Events. I. The Zero Shear Case [PDF]
The Astrophysical Journal, 1996 For a given source and lens pair, there is a thin on-axis tube-like volume behind the lens in which the radiation flux from the source is greatly increased due to gravitational lensing. Any objects (such as dust grains) which pass through such a thin tube will experience strong bursts of radiation, i.e., Extreme Gravitational Lensing Events (EGLE).
Wang, Yun, Turner, Edwin L.
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Statistics of Extreme Gravitational Lensing Events. II. The Finite Shear Case [PDF]
The Astrophysical Journal, 1997 17 pages including 3 figures, using AAS LATEX macros v4.0.
Wang, Yun, Turner, Edwin L.
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Weak gravitational lensing in different cosmologies, using an algorithm for shear in three dimensions [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 25 pages, LaTeX, 30 ...
Andrew J. Barber +3 more
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An Unbiased Method of Measuring the Ratio of Two Data Sets
The Astrophysical Journal Supplement Series, 2023 In certain cases of astronomical data analysis, the meaningful physical quantity to extract is the ratio R between two data sets. Examples include the lensing ratio, the interloper rate in spectroscopic redshift samples, and the decay rate of ...
Zeyang Sun +7 more
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Means of confusion: how pixel noise affects shear estimates for weak gravitational lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 integrated the origin of the moment correlation (thanks to Alan Heavens).
Melchior, P., Viola, M.
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The Astrophysical Journal, 2022 Abstract We study the gravitational lensing influence of a massive object in a dark matter halo, using a simple model of a point mass embedded in a spherical Navarro–Frenk–White halo. Building on the analysis of critical curves and caustics presented in the first part of this work, we proceed to explore the geometry of images formed by ...
Michal Karamazov, David Heyrovský
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Gravitational lensing shear by an exotic lens object with negative convergence or negative mass [PDF]
Physical Review D, 2013 Gravitational lens models with negative convergence(surface mass density projected onto the lens plane) inspired by modified gravity theories, exotic matter and energy have been recently discussed in such a way that a static and spherically-symmetric modified spacetime metric depends on the inverse distance to the power of positive $n$(n=1 for ...
Izumi, Koji +4 more
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