Spitzer's View of the Candidate Cluster and Protocluster Catalog (CCPC)
arXiv:1701.05560 · doi:10.3847/1538-4357/836/1/136
Abstract
The Candidate Cluster and Protocluster Catalog (CCPC) contains 218 galaxy overdensities com- posed of more than 2000 galaxies with spectroscopic redshifts spanning the first few Gyrs after the Big Bang (2.0 < z < 6.6). We use Spitzer archival data to track the underlying stellar mass of these overdense regions in various temporal cross sections by building rest-frame near-infrared luminosity functions across the span of redshifts.This exercise maps the stellar growth of protocluster galaxies, as halos in the densest environments should be the most massive from hierarchical accretion. The characteristic apparent magnitude, m*(z), is relatively flat from 2.0 < z < 6.6, consistent with a passive evolution of an old stellar population. This trend maps smoothly to lower redshift results of cluster galaxies from other works. We find no difference in the luminosity
22 pages and 9 figures. Accepted to the Astrophysical Journal
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