Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey

Christopher A. J. Duncan, Catherine Heymans, Alan F. Heavens, Benjamin Joachimi

Research output: Contribution to journalArticlepeer-review

Abstract

We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from the HST-STAGES survey of the A901/902 supercluster we detect the four known groups in the supercluster at high significance using magnification alone. We discuss the application of a fully Bayesian inference analysis, and investigate a broad range of potential systematics in the application of the method. We compare our results to a previous weak lensing shear analysis of the same field finding the recovered signal-to-noise of our magnification-only analysis to range from 45% to 110% of the signal-to-noise in the shear-only analysis. On a case-by-case basis we find consistent magnification and shear constraints on cluster virial radius, and finding that for the full sample, magnification constraints to be a factor $0.77 \pm 0.18$ lower than the shear measurements.
Original languageEnglish
Pages (from-to)764-785
JournalMonthly Notices of the Royal Astronomical Society
Volume457
Issue number1
Early online date25 Jan 2016
DOIs
Publication statusPublished - 21 Mar 2016

Keywords

  • astro-ph.CO

Fingerprint

Dive into the research topics of 'Cluster mass profile reconstruction with size and flux magnification on the HST STAGES survey'. Together they form a unique fingerprint.

Cite this