NOAO >   Observing Info >   Approved Programs >   2009A-0219

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Proposal Information for 2009A-0219


PI: Tracy Webb, McGill University, webb@physics.mcgill.ca
Address: 3600 rue University , Ernest Rutherford Physics Building, McGill University, Montreal,Quebec, H3A 2T8, Canada

CoI: Ashley Faloon, McGill University
CoI: Daniel O'Donnell, McGill University
CoI: Allison Noble, McGill University
CoI: Howard Yee, University of Toronto
CoI: Erica Ellingson, University of Colorado, Boulder
CoI: Adam Muzzin, Yale University
CoI: Felipe Barrientos, Pontificia Universidad Cat?lica de Chile
CoI: Renbin Yan, University of Toronto
CoI: David Gilbank, University Of Waterloo
CoI: Mike Gladders, The University of Chicago

Title: Spectroscopy of Infrared Galaxies in Clusters to z = 1

Abstract: We are conducting a multi-wavelength study of a unique sample of galaxy clusters over the redshift range 0.3 < z < 1.1. A key component of this program is infrared imaging with the Spitzer Space Telescope at 24microns, which is sensitive to dust enshrouded star formation activity and active galactic nuclei (AGN). The intial results of this program indicate an increase in the number of infared luminous galaxies in clusters with redshift; however these results rely on statistical background subtraction and are dominated by cosmic variance. Here we propose to obtain deep spectroscopic observations of the infrared sources within the cluster fields, which are key to (i) studying the evolution of the infrared galaxy luminosity function within clusters with redshift, in comparison to the field, and as a function of cluster properties, such as mass and dynamicl state; and (ii) elucidating the nature and origin of the infrared galaxies in clusters, in the context of hierarchical formation and galaxy evolution in high-density regions. Our sample is unique in having the mass, redshift, and multi-wavelength coverage to address these important scientific issues.


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



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