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A LABOCA and ATCA Survey of Southern Atacama Cosmology Telescope (ACT) Clusters
Lindner, Robert ( Rutgers, The State University of New Jersey ) show affiliations
American Astronomical Society, AAS Meeting #221, id.124.07
Published in Jan 2013
I will present results from the LABOCA/ACT Survey of Clusters at All Redshifts (LASCAR) project. LASCAR has used the Large APEX Bolometer Camera (LABOCA) on the Atacama Pathfinder Experiment (APEX) to obtain 19"-resolution 870um imaging of ten of the most massive galaxy clusters that were detected as Sunyaev-Zel’dovich effect (SZE) decrements in a 455 sq degree Atacama Cosmology Telescope (ACT) map. We have detected 870um SZE increments in multiple clusters out to 1, which we use to study the physical properties of their intracluster media. We also examine the properties of background lensed submillimeter galaxies, and stack on cluster members to study star formation in dense environments. We have acquired 2.1GHz imaging of the sample from the Australia Telescope Compact Array (ATCA) which we use to disentangle SMGs from SZE emission near the cluster centers. The project benefits from multiwavelength follow-up at optical (NTT, SOAR, VLT, Gemini), X-ray (Chandra), and infrared (Spitzer) wavelengths. Included in our sample is the “El Gordo” system, an exceptionally massive Bullet-like cluster merger at z=0.87 with two prominent complexes of radio relics.
(c) 2013: American Astronomical Society