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We report a search for the presence of dust in the intra-cluster medium basedon the study of statistical reddening of background galaxies. Armed with theRed Sequence Cluster survey data, from which we extracted (i) a catalog of 458clusters with z_clust < 0.5 and (ii) a catalog of ~90,000 galaxies withphotometric redshift 0.5 < z_ph < 0.8 and photometric redshift uncertaintydelta z_ph / (1+z_ph) < 0.06, we have constructed several samples of galaxiesaccording to their projected distances to the cluster centers. No significantcolor differences [<E(B-R_c)> = 0.005 pm 0.008, and <E(V-z')> = 0.000 pm 0.008]were found for galaxies background to the clusters, compared to the references.Assuming a Galactic extinction law, we derive an average visual extinction of<A_V> = 0.004 pm 0.010 towards the inner 1x R_200 of clusters.

Searching for dust in the intracluster medium from reddening of background galaxies