RCSLenS: Cosmic Distances from Weak Lensing

Abstract

In this paper we present results of applying the shear-ratio method to the RCSLenS data. The method takes the ratio of the mean of the weak lensing tangential shear signal about galaxy clusters, averaged over all clusters of the same redshift, in multiple background redshift bins. In taking a ratio the mass-dependency of the shear signal is cancelled-out leaving a statistic that is dependent on the geometric part of the lensing kernel only. We apply this method to 535 clusters and measure a cosmology-independent distance-redshift relation to redshifts z~1. In combination with Planck data the method lifts the degeneracies in the CMB measurements, resulting in cosmological parameter constraints of OmegaM=0.31 +/- 0.10 and w0 = -1.02 +/- 0.37, for a flat wCDM cosmology.

9 pages, 5 figures. Submitted to MNRAS

References in corpus (2)

• Gravitational Lensing Analysis of the Kilo Degree Survey
• RCSLenS: Testing gravitational physics through the cross-correlation of weak lensing and large-scale structure

Cited by in corpus (8)

• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• KiDS-1000 catalogue: Redshift distributions and their calibration
• RCSLenS: The Red Cluster Sequence Lensing Survey
• Cross-correlating Planck CMB lensing with SDSS: Lensing-lensing and galaxy-lensing cross-correlations
• CFHTLenS and RCSLenS Cross-Correlation with Planck Lensing Detected in Fourier and Configuration Space
• Cosmological lensing ratios with DES Y1, SPT and Planck
• An unbiased method of measuring the ratio of two data sets
• Cosmic Shear Measurement using Autoconvolved Images