Results 71 to 80 of about 68,770 (225)
Biased Dark Energy Constraints from Neglecting Reduced Shear in Weak Lensing Surveys [PDF]
, 2008 The weak gravitational lensing of distant galaxies by large-scale structure is expected to become a powerful probe of dark energy. By measuring the ellipticities of large numbers of background galaxies, the subtle gravitational distortion called "cosmic ...
Shapiro, Charles
core +2 more sources
Morphology of CMB fields—effect of weak gravitational lensing [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 We study the morphology of the cosmic microwave background temperature and polarization fields using the shape and alignment parameters, β and α, that are constructed from the contour Minkowski tensor.
Priya Goyal, P. Chingangbam, S. Appleby
semanticscholar +1 more source
Cluster Weak Gravitational Lensing
International School of Physics “Enrico Fermi”, 2010 Weak gravitational lensing of background galaxies is a unique, direct probe of the distribution of matter in clusters of galaxies. We review several important aspects of cluster weak gravitational lensing together with recent advances in weak lensing techniques for measuring cluster lensing profiles and constraining cluster structure parameters.
openaire +2 more sources
Weak Gravitational Lensing and Its Cosmological Applications [PDF]
Annual Review of Nuclear and Particle Science, 2008 Weak gravitational lensing is a unique probe of the dark side of the universe: It provides a direct way to map the distribution of dark matter around galaxies and clusters of galaxies as well as on cosmological scales. Furthermore, the measurement of the weak lensing–induced distortions of the shapes of distant galaxies is a potentially powerful probe
Hoekstra, Henk, Jain, Bhuvnesh
openaire +2 more sources
Optical properties of null geodesics emerging from dynamical systems
European Physical Journal C: Particles and Fields, 2022 We study optical metrics via null geodesics as a central force system, deduce the related Binet equation and apply the analysis to certain solutions of Einstein’s equations with and without spherical symmetry.
D. Batic, S. Chanda, P. Guha
doaj +1 more source
, 2009 The cosmic microwave background (CMB) represents a unique source for the study of gravitational lensing. It is extended across the entire sky, partially polarized, located at the extreme distance of z=1100, and is thought to have the simple, underlying ...
Challinor, Anthony +2 more
core +1 more source
Weak gravitational lensing by multi-horizons black hole
Europhysics lettersWe investigate the weak gravitational lensing caused by multi-horizon black hole (MHBH) on light. Using the Gauss-Bonnet theorem, which demonstrates that light bending is a topological and global phenomenon, we are able to deduce the deflection angle of ...
Farzan Mushtaq +3 more
semanticscholar +1 more source
Studying galaxy troughs and ridges using weak gravitational lensing with the Kilo-Degree Survey [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We study projected underdensities in the cosmic galaxy density field known as 'troughs', and their overdense counterparts, which we call 'ridges'. We identify these regions using a bright sample of foreground galaxies from the photometric Kilo-Degree ...
M. Brouwer +17 more
semanticscholar +1 more source
Weak Gravitational Lensing from Regular Bardeen Black Holes [PDF]
International Journal of Theoretical Physics, 2015 20 pages, 7 figures with some ...
Hossein Ghaffarnejad, Hassan niad
openaire +2 more sources
European Physical Journal C: Particles and Fields, 2018 Beyond the Einstein–Maxwell model, electromagnetic field might couple with gravitational field through the Weyl tensor. In order to provide one of the missing puzzles of the whole physical picture, we investigate weak deflection lensing for photons ...
Wei-Guang Cao, Yi Xie
doaj +1 more source