NOAO >   Observing Info >   Approved Programs >   2012A-0204

Small NOAO Logo

Proposal Information for 2012A-0204


PI: Anthony Gonzalez, University of Florida, anthony@astro.ufl.edu
Address: Astronomy Department, Bryant Space Science Center, University of Florida, Gainesville, FL 32611-2055, USA

CoI: Daniel Gettings, University of Florida
CoI: Spencer Adam Stanford, UC Davis/ LLNL
CoI: Mark Brodwin, University of Missouri - Kansas City
CoI: Peter Eisenhardt, JPL
CoI: Cosimo Fedeli, University of Florida
CoI: Conor Mancone, University of Florida
CoI: Casey Papovich, Texas A&M
CoI: Yen-Ting Lin, CfA
CoI: Alexey Vikhlinin, CfA
CoI: Daniel Stern, JPL
CoI: Matt Hilton, Nottingham

Title: A WISE Search for the Most Massive High Redshift Galaxy Clusters

Abstract: We request I and K_s imaging from WIYN and SOAR as part of a comprehensive all-sky program to detect and characterize the most massive galaxy clusters at z>1.2, with the dual aims of constraining the Gaussianity of the initial density perturbations after inflation and exploring the evolution of the oldest galaxies in the most overdense environments. The foundation for this program is %the Preliminary Release data from the NASA Wide Field Infrared Explorer (WISE), %WISE is an all-sky infrared survey mission. Our team has developed a modified version of the cluster detection algorithm developed by Papovich (2008) that employs color selection in the two bluest bands (3.4 and 4.6 (mu)m) to isolate galaxies at z\ga 1.2 and identify clusters as overdensities of L^* galaxies at these redshifts. The technique has been applied to the full WISE data set, and we are conducting initial imaging follow-up of fall targets this semester. Our first run with 2011B NOAO time begins on October 8. The immediate aim of the proposed observations is to detect the red sequence using I-K_s photometry to both confirm candidate clusters and obtain photometric redshift estimates.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2012A-0204

noaoprop-help@noao.edu

Small NOAO Logo