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Weak Gravitational Lensing by Voids [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We consider the prospects for detecting weak gravitational lensing by underdensities (voids) in the large-scale matter distribution. We derive the basic expressions for magnification and distortion by spherical voids. Clustering of the background sources
Amendola, Luca +2 more
core +6 more sources
Weak gravitational lensing with DEIMOS [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 We introduce a novel method for weak-lensing measurements, which is based on a mathematically exact deconvolution of the moments of the apparent brightness distribution of galaxies from the telescope's PSF.
Amara +20 more
core +10 more sources
Weak gravitational lensing of finite beams [PDF]
Physical Review Letters, 2017 The standard theory of weak gravitational lensing relies on the infinitesimal light beam approximation. In this context, images are distorted by convergence and shear, the respective sources of which unphysically depend on the resolution of the ...
Fleury, Pierre +2 more
core +8 more sources
The gravitational bending of acoustic Schwarzschild black hole [PDF]
European Physical Journal C: Particles and Fields, 2023 Acoustic black hole is becoming an attractive topic in recent years, for it open-up new direction for experimental/observational explorations of black holes.
Chen-Kai Qiao, Mi Zhou
doaj +2 more sources
Weak Gravitational Lensing by Dark Clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We calculate the abundance of dark-matter concentrations that are sufficiently overdense to produce a detectable weak-gravitational-lensing signal. Most of these overdensities are virialized halos containing identifiable X-ray and/or optical clusters ...
Kamionkowski, Marc, Weinberg, Nevin N.
core +10 more sources
Peaks in weak lensing mass maps for cluster astrophysics and cosmology [PDF]
Proceedings of the Japan Academy. Series B, Physical and Biological SciencesClusters of galaxies can be identified from the peaks in weak lensing aperture mass maps constructed from weak lensing shear catalogs. Such purely gravitational cluster selection differs considerably from traditional cluster selection based on the ...
Masamune OGURI, Satoshi MIYAZAKI
doaj +2 more sources
Weak gravitational lensing with the Square Kilometre Array [PDF]
Proceedings of Advancing Astrophysics with the Square Kilometre Array — PoS(AASKA14), 2015 We investigate the capabilities of various stages of the SKA to perform world-leading weak gravitational lensing surveys. We outline a way forward to develop the tools needed for pursuing weak lensing in the radio band.
Abdalla, F. B. +14 more
core +8 more sources
Gravitational lensing around Kehagias–Sfetsos compact objects surrounded by plasma
European Physical Journal C: Particles and Fields, 2019 We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter $$\omega _{_{KS}}$$ ωKS , in the presence of plasma, considering its homogeneous or power-law density distribution.
Sudipta Hensh +3 more
doaj +3 more sources
Weak Gravitational Lensing in Fourth Order Gravity [PDF]
Physical Review D, 2011 For a general class of analytic $f(R,R_{\alpha\beta}R^{\alpha\beta},R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$ we discuss the gravitational lensing in the Newtonian Limit of theory.
Stabile, A., Stabile, An.
core +3 more sources
Geometric Outlines of the Gravitational Lensing and Its Astronomic Applications
Universe, 2023 Gravitational lensing is a topic of great application value in the field of astronomy. The properties and research methods of gravitational lensing are closely related to the geometric and relativistic characteristics of the background universe.
Bin Shen, Mingyang Yu
doaj +1 more source