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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
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Toward an Optimal Reconstruction of the Shear Field with PDF-folding
The Astrophysical Journal, 2023 Weak lensing provides a direct way of mapping the density distribution in the Universe. To reconstruct the density field from the shear catalog, an important step is to build the shear field from the shear catalog, which can be quite nontrivial due to ...
Haoran Wang +3 more
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Testing Velocity-field Lensing on IllustrisTNG Galaxies
The Astrophysical Journal, 2023 Weak gravitational lensing shear could be measured far more precisely if information about unlensed attributes of source galaxies were available. Disk galaxy velocity fields supply such information, at least in principle, with idealized models predicting
Jean Donet, David Wittman
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The Astronomical Journal, 2023 The Superpressure Balloon-borne Imaging Telescope ( SuperBIT ) is a diffraction-limited, wide-field, 0.5 m, near-infrared to near-ultraviolet observatory designed to exploit the stratosphere’s space-like conditions.
Jacqueline E. McCleary +25 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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Gravitational Lensing from a Spacetime Perspective [PDF]
Living Reviews in Relativity, 2004 Volker Perlick
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Metadetection Weak Lensing for the Vera C. Rubin Observatory
The Open Journal of Astrophysics, 2023 Forthcoming astronomical imaging surveys will use weak gravitational lensing shear as a primary probe to study dark energy, with accuracy requirements at the 0.1% level.
Erin S. Sheldon +4 more
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Dark Matter Sterile Neutrino from Scalar Decays
Universe, 2021 We place constraints on DM sterile neutrino scalar decay production (SDP) assuming that sterile neutrinos representa fraction from the total Cold Dark Matter energy density. For the cosmological analysis we complement the CMB anisotropy measurements with
Lucia Aurelia Popa
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Source Distributions of Cosmic Shear Surveys in Efficiency Space
The Open Journal of Astrophysics, 2020 We show that the lensing efficiency of cosmic shear generically has a simple shape, even in the case of a tomographic survey with badly behaved photometric redshifts.
Nicolas Tessore, Ian Harrison
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Multipole analysis of cluster weak lensing shear in The Three Hundred project [PDF]
EPJ Web of ConferencesWeak gravitational lensing is an important tool to estimate the masses of galaxy clusters, as it allows us to directly access their projected surface mass density along the line of sight in a manner largely independent of their dynamical state. Moreover,
Payerne C. +4 more
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