Weak lensing analysis of CODEX clusters using dark energy camera legacy survey : mass-richness relation

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Phriksee , A , Jullo , E , Limousin , M , Shan , H , Finoguenov , A , Komonjinda , S , Wannawichian , S & Sawangwit , U 2020 , ' Weak lensing analysis of CODEX clusters using dark energy camera legacy survey : mass-richness relation ' , Monthly Notices of the Royal Astronomical Society , vol. 491 , no. 2 , pp. 1643-1655 . https://doi.org/10.1093/mnras/stz3049

Title: Weak lensing analysis of CODEX clusters using dark energy camera legacy survey : mass-richness relation
Author: Phriksee, Anirut; Jullo, Eric; Limousin, Marceau; Shan, HuanYuan; Finoguenov, Alexis; Komonjinda, Siramas; Wannawichian, Suwicha; Sawangwit, Utane
Contributor: University of Helsinki, Department of Physics
Date: 2020-01
Language: eng
Number of pages: 13
Belongs to series: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
URI: http://hdl.handle.net/10138/312446
Abstract: We present the weak-lensing analysis of 279 CODEX clusters using imaging data from 4200 deg(2) of the DECam Legacy Survey (DECaLS) Data Release 3. The cluster sample results from a joint selection in X-ray, optical richness in the range 20 proportional to M-0 (lambda/40)(F lambda). By measuring the CODEX cluster sample as an individual cluster, we obtain the best-fitting values, M-0 = 3.24(-0.27)(+0.29) x 10(14)M(circle dot), and F-lambda = 1.00(-0.22)(+0.22) for the richness scaling index, consistent with a power-law relation. Moreover, we separate the cluster sample into three richness groups; lambda = 20-30, 30-50, and 50-110, and measure the stacked excess surface mass density profile in each group. The results show that both methods are consistent. In addition, we find an excellent agreement between our weak lensing based scaling relation and the relation obtained with dynamical masses estimated from cluster member velocity dispersions measured by the SDSS-IV/SPIDERS team. This suggests that the cluster dynamical equilibrium assumption involved in the dynamical mass estimates is statistically robust for a large sample of clusters.
Subject: gravitational lensing: weak
galaxy: clusters: general
large-scale structure of Universe
HALO-MASS
SCALING RELATIONS
PEAK STATISTICS
GALAXY CLUSTERS
MATTER HALOES
CALIBRATION
CONSTRAINTS
PRECISION
PROFILES
COVARIANCE
115 Astronomy, Space science
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