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Title:The Mt. Laguna Infrared Cluster Survey: A Search for Galaxy Clusters Beyond Z = 1
Author(s):Griffin, Michelle Marie
Doctoral Committee Chair(s):Laird A. Thompson
Department / Program:Astronomy
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Physics, Astronomy and Astrophysics
Abstract:The Mt. Laguna Infrared Cluster Survey (MLICS) is a survey for distant galaxy clusters conducted in the JHK' bands on the 1-m telescope at Mt. Laguna Observatory. By smoothing images after subtraction of foreground objects, clusters were detected by the fluctuations they cause in the near-infrared background light. False detections were eliminated by the J - K' color of candidate brightest cluster galaxies. The survey catalog consists of 151 cluster candidates at 0.5 ≤ zest ≤ 1.5 over 0.7 deg2. These include the first cluster candidates found in a serendipitous survey at z > 1.3. The catalog provides a sample of high-redshift cluster candidates suitable for further study, many located near guide stars for adaptive optics systems. The effectiveness of the cluster detection method was proven through the detection of test clusters and through Monte Carlo simulations. These simulations show that the survey can find clusters of M ∼ 1015 h-1 M⊙ to z ∼ 1.4 and even clusters with M ∼ 2 x 1014h-1 M⊙ as distant as z ∼ 0.8. The false positive rate of the catalog is estimated to be 50% at z < 1 based on I-band follow-up observations. The MLICS cluster density may be greater than that predicted by N-body simulations at previously untested distances of z > 1 and show that the evolution of the cluster number density is slower than previously thought.
Issue Date:2003
Description:149 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003.
Other Identifier(s):(MiAaPQ)AAI3111549
Date Available in IDEALS:2015-09-25
Date Deposited:2003

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