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arXiv · 0801.2613

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

Sebastien Muller·Szu-Ying Wu·Bau-Ching Hsieh·Rosa Gonzalez·Laurent Loinard·Howard Yee·Mike Gladders
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Abstract

We report a search for the presence of dust in the intra-cluster medium based on the study of statistical reddening of background galaxies. Armed with the Red Sequence Cluster survey data, from which we extracted (i) a catalog of 458 clusters with z_clust < 0.5 and (ii) a catalog of ~90,000 galaxies with photometric redshift 0.5 < z_ph < 0.8 and photometric redshift uncertainty delta z_ph / (1+z_ph) < 0.06, we have constructed several samples of galaxies according to their projected distances to the cluster centers. No significant color differences [ = 0.005 pm 0.008, and = 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 = 0.004 pm 0.010 towards the inner 1x R_200 of clusters.

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Sebastien Muller, Szu-Ying Wu, Bau-Ching Hsieh, Rosa Gonzalez, Laurent Loinard, Howard Yee, Mike Gladders. 2008-01-17. Searching for dust in the intracluster medium from reddening of background galaxies. https://doi.org/10.1086/529583

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