Weak lensing and galaxy clusters
The Splashback Feature around DES Galaxy Clusters: Galaxy Density and Weak Lensing Profiles
... our weak lensing measurement demonstrates for the first time the existence of a splashback-like steepening of the matter pro file of galaxy ...the weak lensing data, in good agreement ...
18
Clash : Weak-lensing shear-and-magnification analysis of 20 galaxy clusters
... shear-and-magnification weak-lensing analysis of a sample of 16 X-ray-regular and 4 high- magnification galaxy clusters at ...Cluster Lensing And Supernova survey with Hubble ...
25
CFHTLenS: a weak lensing shear analysis of the 3D-Matched-Filter galaxy clusters
... the galaxy colour information in the richness esti- mate of the previous three examples, in particular, creates difficulty in drawing meaningful comparisons between their mass-richness scaling relation and the ...
15
Simulating mock observations for weak lensing analysis and galaxy clusters mass estimates
... each galaxy to z s = 2, the same considered to build the LensTool model, which allowed the comparison between the model and shear pro- files obtained from the ...
122
Mock weak lensing analysis of simulated galaxy clusters: bias and scatter in mass and concentration
... of galaxy clus- ters from the Millennium Simulation, each of which is ‘ob- served’ in a number of different, randomly selected projec- ...of clusters or limiting the analysis to a particular radial ...
18
Improved optical mass tracer for galaxy clusters calibrated using weak lensing measurements
... of clusters in the maxBCG catalogue (Mandelbaum, Seljak & Hirata ...of clusters with high- luminosity BCGs relative to those that have low-luminosity ones, since the former tend to have earlier ...
13
Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data
... We especially seek to fully account for systematic effects, considering biases in shear and photometric redshift measurements, cluster member contamination in the lensed background sourc[r] ...
23
Weak-lensing-inferred scaling relations of galaxy clusters in the RCS2: mass-richness, mass-concentration, mass-bias, and more
... high-redshift clusters are affected by selection ...of clusters. Large-scale structure may be present between the clusters, which boosts the projected density at small ...
22
Gruen, Daniel (2015): Weak lensing by galaxy clusters: from pixels to cosmology. Dissertation, LMU München: Fakultät für Physik
... Median stacks, however, are problematic in two important respects as well. For large, outlier-free samples, the variance of the median is a factor of π/2 ≈ 1.57 larger than the variance of the mean, such that the total ...
249
Galaxy–galaxy weak gravitational lensing in f(R) gravity.
... that weak lensing offers a venue to detect the total matter distribution between the source and ...observer. Weak lensing can be observed in different ways, depending on the size of the ...
17
Weak lensing measurements of the APEX-SZ galaxy cluster sample.
... For 39 massive galaxy clusters that were observed via the Sunyaev–Zel’dovich effect (SZE) with the APEX telescope, we analyse deep optical imaging data from WFI(@2.2mMPG/ESO) and Suprime[r] ...
25
CLUMP-3D: Three-dimensional Shape and Structure of 20 CLASH Galaxy Clusters from Combined Weak and Strong Lensing
... from weak-lensing, strong- lensing, X-ray, and SZE observations, demonstrating the power of multi-probe cluster ...CLASH clusters from a joint analysis of 2D shear and azimuthally averaged ...
23
Gravitational lensing : an advanced method to recover the mass distribution of galaxy clusters
... The weak lensing best fit parameters, obtained from the fit of the shear profiles, are given in column ...and weak lensing (columns ...the weak-lensing and combined ...
184
Weak Lensing Calibrated M-T Scaling Relation of Galaxy Groups in the COSMOS Field
... for galaxy clusters and groups is instrumental for cluster-based cosmology and an important probe for the thermodynamics of the intracluster ...the weak lensing mass and X-ray spectroscopic ...
11
Joint reconstruction of the mass distributions of galaxy clusters from gravitational lensing and thermal gas
... massive galaxy clusters and the different observables they ...and weak-lensing reconstruction code SaWLens of Merten ( 2010 ) in Chap- ter 4 ...the weak-lensing reconstruction of ...
109
Cosmology with Weak Lensing Peaks
... above, weak lensing measurements and the abundance of galaxy clusters are both sensitive to both the geometry of the universe and the growth rate of the ...importantly, weak ...
172
Weak lensing magnification in SpARCS
... Hu 1998). Nonlinear Evolution of Density Perturbations Although linear perturbation theory is sufficient to give an overall idea about the evol- ution of density perturbations, it cannot describe accurately the growth of ...
111
MC2: A Deeper Look at ZwCl 2341.1+0000 with Bayesian Galaxy Clustering and Weak Lensing Analyses
... Merging galaxy clusters are of interest in cosmology for their richness in astrophysical processes, including shocks, enhanced X-ray and nonthermal radio emissions, and their potential to probe the nature ...
63
Density profiles of galaxy groups and clusters from SDSS galaxy-galaxy weak lensing
... Use of the the canonical slopes α = −1 and β = 3 gives best-fit concentrations of 5.0 ± 0.6 ± 1 and 5.6 ± 0.5 ± 1 for faint and bright lens samples, respectively, where the first error is statistical and second ...
22
Weak Gravitational Lensing and Galaxy Bias
... rich galaxy clusters where their fraction is about 90 percent, whereas outside of galaxy clusters about 70 percent of the field galaxies are bluish late-type galaxies ...
233