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We perform a measurement of the mass--richness relation of the redMaPPer galaxy cluster catalogue using weak lensing data from the Sloan Digital Sky Survey. We have carefully characterized a broad range of systematic uncertainties,…

宇宙学与河外天体物理 · 物理学 2017-04-05 Melanie Simet , Tom McClintock , Rachel Mandelbaum , Eduardo Rozo , Eli Rykoff , Erin Sheldon , Risa H. Wechsler

Weak gravitational lensing provides a direct way to study the mass distribution of clusters of galaxies at large radii. Unfortunately, large scale structure along the line of sight also contributes to the lensing signal, and consequently…

天体物理学 · 物理学 2009-11-07 Henk Hoekstra

We present cosmological constraints from measurements of the gas mass fraction, $f_{gas}$, for massive, dynamically relaxed galaxy clusters. Our data set consists of Chandra observations of 40 such clusters, identified in a comprehensive…

We present weak lensing mass estimates for a sample of 458 galaxy clusters from the redMaPPer Sloan Digital Sky Survey DR8 catalogue using Hyper Suprime-Cam weak lensing data. We develop a method to quickly estimate cluster masses from weak…

宇宙学与河外天体物理 · 物理学 2022-04-20 Calum Murray , James G. Bartlett , Emmanuel Artis , Jean-Baptiste Melin

We analysed the 3D clustering of the Planck sample of Sunyaev-Zeldovich (SZ) selected galaxy clusters, focusing on the redshift-space two-point correlation function (2PCF). We compared our measurements to theoretical predictions of the…

宇宙学与河外天体物理 · 物理学 2023-06-07 G. F. Lesci , A. Veropalumbo , M. Sereno , F. Marulli , L. Moscardini , C. Giocoli

We present the weak lensing analysis of the Wide-Field Imager SZ Cluster of galaxy (WISCy) sample, a set of 12 clusters of galaxies selected for their Sunyaev-Zel'dovich (SZ) effect. After developing new and improved methods for background…

宇宙学与河外天体物理 · 物理学 2015-06-17 D. Gruen , S. Seitz , F. Brimioulle , R. Kosyra , J. Koppenhoefer , C. -H. Lee , R. Bender , A. Riffeser , T. Eichner , T. Weidinger , M. Bierschenk

This is the first in a series of papers on the weak lensing effect caused by clusters of galaxies in Sloan Digital Sky Survey. The photometrically selected cluster sample, known as MaxBCG, includes ~130,000 objects between redshift 0.1 and…

(Abridged) We quantify the bias and scatter in galaxy cluster masses and concentrations derived from an idealised mock weak gravitational lensing (WL) survey, and their effect on the cluster mass-concentration relation. For this, we…

宇宙学与河外天体物理 · 物理学 2012-05-14 Yannick M. Bahé , Ian G. McCarthy , Lindsay J. King

Rich and massive clusters of galaxies at intermediate redshift are capable of magnifying and distorting the images of background galaxies. A comparison of different mass estimators among these clusters can provide useful information about…

天体物理学 · 物理学 2009-10-30 Xiang-Ping Wu , Tzihong Chiueh , Li-Zhi Fang , Yan-Jie Xue

We present a simultaneous analysis of galaxy cluster scaling relations between weak-lensing mass and multiple cluster observables, across a wide range of wavelengths, that probe both gas and stellar content. Our new hierarchical Bayesian…

In recent years, the availability of large, complete cluster samples has enabled numerous cosmological parameter inference analyses using cluster number counts. These have provided constraints on the cosmic matter density $\Omega_m$ and the…

宇宙学与河外天体物理 · 物理学 2021-11-23 P. S. Corasaniti , M. Sereno , S. Ettori

As the quality of the available galaxy cluster data improves, the models fitted to these data might be expected to become increasingly complex. Here we present the Bayesian approach to the problem of cluster data modelling: starting from…

天体物理学 · 物理学 2009-11-10 P. J. Marshall , M. P. Hobson , A. Slosar

We present a method for measuring the masses of galaxy clusters using the imprint of their gravitational lensing signal on the cosmic microwave background (CMB) temperature anisotropies. The method first reconstructs the projected…

宇宙学与河外天体物理 · 物理学 2015-05-27 Jean-Baptiste Melin , James G. Bartlett

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…

天体物理学 · 物理学 2007-05-23 H. Dahle

We present an analysis of observations made with the Arcminute Microkelvin Imager (AMI) and the Canada-France-Hawaii Telescope (CFHT) of six galaxy clusters in a redshift range of 0.16--0.41. The cluster gas is modelled using the…

We present the cluster mass-richness scaling relation calibrated by a weak lensing analysis of >18000 galaxy cluster candidates in the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). Detected using the 3D-Matched-Filter…

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…

天体物理学 · 物理学 2007-05-23 Henk Hoekstra , Howard Yee , Mike Gladders

We test the precision with which weak lensing data can provide characteristic cluster mass profiles within Cold Dark Matter scenarios. Using a parallel treecode to simulate volumes as large as 500h-1 Mpc with good resolution, we generate…

天体物理学 · 物理学 2009-10-28 Mary Crone , Fabio Governato , Joachim Stadel , Thomas Quinn