M/L of X-ray luminous clusters from weak lensing

Abstract

Abstract. We present results from a weak lensing survey of a sample of 53 clusters of galaxies at 0.15 < z < 0.4, selected based on their high X-ray luminosities. For each cluster, we measure the mass-to-light ratio out to a radius R ∼ (0.5 − 1.5)h −1 Mpc. By measuring the lensing masses of a large sample of clusters in a consistent way, we quantify the intrinsic scatter in M/L and determine its average value for massive clusters. In the near future, an ongoing spectrophotometric and weak lensing survey of a supercluster region in Aquarius will extend M/L measurements to much larger radii and explore its dependence on scale and environment.