Studies of Clusters of Galaxies by Professor Blanton and Collaborators
Professor Elizabeth Blanton and collaborators are conducting a large survey of distant clusters of galaxies. They are using bent, double-lobed radio sources (AGN) as signposts for these high-redshift systems since radio sources with these morphologies usually reside in clusters and the radio emission is easy to see to large distances. The group is following up 653 of these sources that were not detected optically to the limit of the Sloan Digital Sky Survey in infrared light using the Spitzer Space Telescope. Deep, follow-up observations in optical light with the Discovery Channel Telescope have begun and will be crucial for estimating the photometric redshifts (to obtain distances) of the potential clusters and studying the galaxies they contain in more detail.