2015/10/31 by Wei Du, Zuhui Fan, Huanyuan Shan +7 · 1 citation
Mathematics · Physics and Astronomy · #Astrophysics #Cluster (spacecraft) #Cosmology #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Halo #Mathematics #Monte Carlo method #Physics #Planck #Redshift #Scientific Research and Discoveries #Statistical physics #Statistics #Stellar, planetary, and galactic studies #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1088/0004-637x/814/2/120
published as ApJ, 814, 120 (2015) · Accepted for Publication in ApJ. 18 pages, 8 figures. Updated to match the published version
openalex publication_date 2015/11/24 · arxiv created 2015/11/25 · arxiv updated 2015/11/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Based on weak lensing data from the Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS), in this paper we study the mass–concentration ( M – c ) relation for ∼200 redMaPPer clusters in the fields. We extract the M – c relation by measuring the density profiles of individual clusters instead of using stacked weak lensing signals. By performing Monte Carlo simulations, we demonstrate that although the signal-to-noise ratio for each individual cluster is low, the unbiased M – c relation can still be reliably derived from a large sample of clusters by carefully taking into account the impacts of shape noise, cluster center offset, dilution effect from member or foreground galaxies, and the projection effect. Our results show that within error bars the derived M – c relation for redMaPPer clusters is in agreement with simulation predictions. There is a weak deviation in that the halo concentrations calibrated by Monte Carlo simulations are somewhat higher than that predicted from Planck cosmology.