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Weak lensing convergence peaks are a promising tool to probe nonlinear structure evolution at late times, providing additional cosmological information beyond second-order statistics. Previous theoretical and observational studies have…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-03 Jia Liu , Zoltan Haiman

This paper is the first of a series of papers constraining cosmological parameters with weak lensing peak statistics using $\sim 450~\rm deg^2$ of imaging data from the Kilo Degree Survey (KiDS-450). We measure high signal-to-noise ratio…

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

The use of large, X-ray selected galaxy cluster catalogues for cosmological analyses requires a thorough understanding of the X-ray mass estimates. Weak gravitational lensing is an ideal method to shed light on such issues, due to its…

Cosmology and Nongalactic Astrophysics · Physics 2017-04-05 Melanie Simet , Nicholas Battaglia , Rachel Mandelbaum , Uroš Seljak

AIMS: We present a weak lensing search of galaxy clusters in the 4 deg2 of the CFHT Legacy Survey Deep. This work aims at building a mass-selected sample of clusters. METHODS: We use the deep i' band images to perform weak lensing mass…

Astrophysics · Physics 2009-11-11 Raphael Gavazzi , Genevieve Soucail

Measurements of the shear induced by weak gravitational lensing around galaxy cluster lines of sight are the gold standard for calibrating cluster observable-mass relations, thereby enabling a robust and precise inference of cosmological…

Cosmology and Nongalactic Astrophysics · Physics 2026-03-26 S. Bocquet , A. Fumagalli , C. T. Davies , K. Dolag , S. Grandis , J. J. Mohr

We quantify two main pathways through which baryonic physics biases cluster count cosmology. We create mock cluster samples that reproduce the baryon content inferred from X-ray observations. We link clusters to their counterparts in a dark…

Cosmology and Nongalactic Astrophysics · Physics 2022-07-22 Stijn N. B. Debackere , Joop Schaye , Henk Hoekstra

We use the abundance and weak lensing mass measurements of the SDSS maxBCG cluster catalog to simultaneously constrain cosmology and the richness--mass relation of the clusters. Assuming a flat \LambdaCDM cosmology, we find…

The Red-Sequence Cluster Survey (RCS) is a 100 square degree galaxy cluster survey designed to provide a large sample of optically selected clusters of galaxies with redshifts 0.1<z<1.4. The survey data are also useful for a variety of…

Astrophysics · Physics 2007-05-23 Henk Hoekstra , Howard Yee , Mike Gladders

We interpret and model the statistical weak lensing measurements around 130,000 groups and clusters of galaxies in the Sloan Digital Sky Survey presented by Sheldon et al. 2007 (Paper I). We present non-parametric inversions of the 2D shear…

Due to observational constraints, dark matter determinations in nearby clusters based on weak lensing are still extremely rare, in spite of their importance for the determination of cluster properties independent of other methods. We…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Raphael Gavazzi , Christophe Adami , Florence Durret , Jean-Charles Cuillandre , Olivier Ilbert , Alain Mazure , Roser Pello , Melville P. Ulmer

AIMS. While weak lensing cannot resolve cluster cores and strong lensing is almost insensitive to density profiles outside the scale radius, combinations of both effects promise to constrain density profiles of galaxy clusters well, and…

Astrophysics · Physics 2015-05-13 J. Merten , M. Cacciato , M. Meneghetti , C. Mignone , M. Bartelmann

Two of the most sensitive probes of the large scale structure of the universe are the clustering of galaxies and the tangential shear of background galaxy shapes produced by those foreground galaxies, so-called galaxy-galaxy lensing.…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-23 A. Porredon , M. Crocce , J. Elvin-Poole , R. Cawthon , G. Giannini , J. De Vicente , A. Carnero Rosell , I. Ferrero , E. Krause , X. Fang , J. Prat , M. Rodriguez-Monroy , S. Pandey , A. Pocino , F. J. Castander , A. Choi , A. Amon , I. Tutusaus , S. Dodelson , I. Sevilla-Noarbe , P. Fosalba , E. Gaztanaga , A. Alarcon , O. Alves , F. Andrade-Oliveira , E. Baxter , K. Bechtol , M. R. Becker , G. M. Bernstein , J. Blazek , H. Camacho , A. Campos , M. Carrasco Kind , P. Chintalapati , J. Cordero , J. DeRose , E. Di Valentino , C. Doux , T. F. Eifler , S. Everett , A. Ferté , O. Friedrich , M. Gatti , D. Gruen , I. Harrison , W. G. Hartley , K. Herner , E. M. Huff , D. Huterer , B. Jain , M. Jarvis , S. Lee , P. Lemos , N. MacCrann , J. Mena-Fernández , J. Muir , J. Myles , Y. Park , M. Raveri , R. Rosenfeld , A. J. Ross , E. S. Rykoff , S. Samuroff , C. Sánchez , E. Sanchez , J. Sanchez , D. Sanchez Cid , D. Scolnic , L. F. Secco , E. Sheldon , A. Troja , M. A. Troxel , N. Weaverdyck , B. Yanny , J. Zuntz , T. M. C. Abbott , M. Aguena , S. Allam , J. Annis , S. Avila , D. Bacon , E. Bertin , S. Bhargava , D. Brooks , E. Buckley-Geer , D. L. Burke , J. Carretero , M. Costanzi , L. N. da Costa , M. E. S. Pereira , T. M. Davis , S. Desai , H. T. Diehl , J. P. Dietrich , P. Doel , A. Drlica-Wagner , K. Eckert , A. E. Evrard , B. Flaugher , J. Frieman , J. García-Bellido , D. W. Gerdes , T. Giannantonio , R. A. Gruendl , J. Gschwend , G. Gutierrez , S. R. Hinton , D. L. Hollowood , K. Honscheid , B. Hoyle , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , C. Lidman , M. Lima , H. Lin , M. A. G. Maia , J. L. Marshall , P. Martini , P. Melchior , F. Menanteau , R. Miquel , J. J. Mohr , R. Morgan , R. L. C. Ogando , A. Palmese , F. Paz-Chinchón , D. Petravick , A. Pieres , A. A. Plazas Malagón , A. K. Romer , B. Santiago , V. Scarpine , M. Schubnell , S. Serrano , M. Smith , M. Soares-Santos , E. Suchyta , G. Tarle , D. Thomas , C. To , T. N. Varga , J. Weller

We use measurements of weak gravitational shear around a sample of massive galaxy clusters at z = 0.3 to constrain their average radial density profile. Our results are consistent with the density profiles of CDM halos in numerical…

Astrophysics · Physics 2007-05-23 H. Dahle

We present high signal-to-noise galaxy-galaxy lensing measurements of the BOSS CMASS sample using 250 square degrees of weak lensing data from CFHTLenS and CS82. We compare this signal with predictions from mock catalogs trained to match…

We employ robust weak gravitational lensing measurements to improve cosmological constraints from measurements of the galaxy cluster mass function and its evolution, using X-ray selected clusters detected in the ROSAT All-Sky Survey. Our…

Weak gravitational lensing has been used extensively in the past decade to constrain the masses of galaxy clusters, and is the most promising observational technique for providing the mass calibration necessary for precision cosmology with…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Rachel Mandelbaum , Uros Seljak , Tobias Baldauf , Robert E. Smith

We describe a weak lensing view of the downsizing of star forming galaxies based on cross correlating a weak lensing ($\kappa$) map with a predicted map constructed from a redshift survey. Moderately deep and high resolution images with…

In this talk I review some of the key questions that weak lensing observations of clusters can potentially answer, and sketch the progress that has been made to date in extracting quantitative estimates of masses and density profiles. A…

Astrophysics · Physics 2007-05-23 Nick Kaiser