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Here I summarize constraints on the nature of the dark matter halos of field galaxies that have been obtained from the most recent investigations of (i) weak galaxy-galaxy lensing and (ii) the dynamics of satellite galaxies in orbit about…

Astrophysics · Physics 2009-11-10 Tereasa G. Brainerd

The Hubble constant ($H_0$), a crucial parameter in cosmology, quantifies the expansion rate of the universe so its precise measurement is important to understand the fundamental dynamics of our evolving universe. One of the major…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-29 Narayan Khadka , Simon Birrer , Alexie Leauthaud , Holden Nix

We calculate the expected lensing statistics of the galaxy population in large, low-redshift surveys. Galaxies are modeled using realistic, multiple components: a dark matter halo, a bulge component and disc. We use semi-analytic models of…

Astrophysics · Physics 2008-11-26 Ole Moeller , Manfred Kitzbichler , Priyamvada Natarajan

We present the results of a weak gravitational lensing analysis to determine whether the stellar mass or the velocity dispersion is more closely related to the amplitude of the lensing signal around galaxies - and hence to the projected…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Edo van Uitert , Henk Hoekstra , Marijn Franx , David G. Gilbank , Michael D. Gladders , H. K. C. Yee

This paper details a description of the pattern of galaxy image distortion over the entire sky caused by the gravitational lensing which is the result of large scale inhomogeneities in our universe. We present a tensor spherical harmonic…

Astrophysics · Physics 2007-05-23 Albert Stebbins

This paper presents the results of a systematic study of projection biases in the Weak Lensing analysis of cosmic shear and the combination of galaxy clustering and galaxy-galaxy lensing using data collected during the first-year of running…

Cosmology and Nongalactic Astrophysics · Physics 2024-11-27 P. R. V. Chintalapati , G. Gutierrez , M. H. L. S. Wang

We report the detection of weak gravitational lensing of faint, distant background galaxies by the rich, X-ray luminous cluster of galaxies MS1054-03 at z=0.83. This is the first measurement of weak lensing by a bona fide cluster at such a…

Astrophysics · Physics 2009-10-28 G. A. Luppino , Nick Kaiser

We explore the possibility that an intrinsic correlation between galaxy ellipticities arising during the galaxy formation process may account for part of the shear signal recently reported by several groups engaged in weak lensing surveys.…

Astrophysics · Physics 2009-07-28 Rupert A. C. Croft , Chris Metzler

A magnitude limited sample of nearly 9000 early-type galaxies, in the redshift range 0.01 < z < 0.3, was selected from the Sloan Digital Sky Survey using morphological and spectral criteria. The sample was used to study how early-type…

We present a new non-parametric method for determining mean 3D density and mass profiles from weak lensing measurements around stacked samples of galaxies or clusters, that is, from measurement of the galaxy-shear or cluster-shear…

We report a measurement of cosmic shear correlations using an effective area of 6.5 sq. deg. of the VIRMOS deep imaging survey in progress at the Canada-France-Hawaii Telescope. We measured various shear correlation functions, the aperture…

The Dark Energy Spectroscopic Instrument (DESI) survey will measure spectroscopic redshifts for millions of galaxies across roughly $14,000 \, \mathrm{deg}^2$ of the sky. Cross-correlating targets in the DESI survey with complementary…

We combine the measurements of luminosity dependence of bias with the luminosity dependent weak lensing analysis of dark matter around galaxies to derive the galaxy bias and constrain nonlinear mass and cosmological parameters. We take…

We present the definitive data for the full sample of 131 strong gravitational lens candidates observed with the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope by the Sloan Lens ACS (SLACS) Survey. All targets were…

We present galaxy--galaxy lensing (GGL) measurements from the full six years of data from the Dark Energy Survey (DES Y6), covering $4031\,\mathrm{deg}^2$ and used in the DES Y6 $3\times2$pt cosmological analysis. We use the MagLim++ lens…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-22 G. Giannini , G. Camacho-Ciurana , A. Whyley , J. Prat , J. Blazek , C. Sánchez , G. Zacharegkas , A. Alarcon , E. Legnani , A. Amon , D. Anbajagane , S. Avila , K. Bechtol , M. R. Becker , G. M. Bernstein , S. Bocquet , A. Campos , A. Carnero Rosell , R. Cawthon , C. Chang , M. Crocce , W. d'Assignies , J. De Vicente , A. Drlica-Wagner , S. Elvin-Poole , A. Ferté , M. Gatti , D. Gruen , M. Jarvis , M. Manera , S. Mau , J. McCullough , F. Menanteau , J. Myles , A. Porredon , M. Rodriguez-Monroy , A. Roodman , E. S. Rykoff , S. Samuroff , D. Sanchez Cid , I. Sevilla-Noarbe , T. Schutt , M. A. Troxel , N. Weaverdyck , M. Yamamoto , B. Yin , T. M. C. Abbott , M. Aguena , S. Allam , O. Alves , F. Andrade-Oliveira , D. Bacon , E. Bertin , D. Brooks , H. Camacho , J. Carretero , L. N. da Costa , M. E. da Silva Pereira , T. M. Davis , D. L. DePoy , S. Desai , H. T. Diehl , P. Doel , C. Doux , T. F. Eifler , S. Everett , A. E. Evrard , P. Fosalba , J. Frieman , J. García-Bellido , E. Gaztanaga , P. Giles , K. Glazebrook , I. Harrison , W. G. Hartley , K. Herner , S. R. Hinton , D. L. Hollowood , K. Honscheid , D. Huterer , B. Jain , D. J. James , N. Jeffrey , T. Kacprzak , S. Kent , E. Krause , O. Lahav , S. Lee , J. L. Marshall , J. Mena-Fernández , R. Miquel , J. J. Mohr , J. Muir , R. C. Nichol , R. L. C. Ogando , A. Palmese , M. Paterno , W. J. Percival , D. Petravick , A. A. Plazas Malagón , M. Raveri , R. Rosenfeld , E. Sanchez , E. Sheldon , T. Shin , J. Allyn. Smith , M. Smith , M. Soares-Santos , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , C. To , D. L. Tucker , V. Vikram , M. Vincenzi , A. R. Walker , P. Wiseman , B. Yanny

Weak gravitational lensing has the potential to constrain cosmological parameters to high precision. However, as shown by the Shear TEsting Programmes (STEP) and GRavitational lEnsing Accuracy Testing (GREAT) Challenges, measuring galaxy…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Tomasz Kacprzak , Joe Zuntz , Barnaby Rowe , Sarah Bridle , Alexandre Refregier , Adam Amara , Lisa Voigt , Michael Hirsch

We have analysed ~24 square degrees of R_C-band imaging data from the Red-Sequence Cluster Survey (RCS), and measured the excess correlations between galaxy ellipticities on scales ranging from 1 to 30 arcminutes. We have used data from two…

We present measurements of the excess mass-to-light ratio measured aroundMaxBCG galaxy clusters observed in the SDSS. This red sequence cluster sample includes objects from small groups with masses ranging from ~5x10^{12} to ~10^{15}…

We report the weak lensing discovery, spectroscopic confirmation, and weak lensing tomography of a massive cluster of galaxies at $z=0.68$, demonstrating that shear selection of clusters works at redshifts high enough to be cosmologically…

Astrophysics · Physics 2009-11-07 D. Wittman , V. E. Margoniner , J. A. Tyson , J. G. Cohen , I. P. Dell'Antonio , A. C. Becker

Weak gravitational lensing allows one to reconstruct the spatial distribution of the projected mass density across the sky. These "mass maps" provide a powerful tool for studying cosmology as they probe both luminous and dark matter. In…

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