Large Structures and Galaxy Evolution in COSMOS at z < 1.1
Abstract
We present the first identification of large-scale structures (LSS) at z in the Cosmic Evolution Survey (COSMOS). The structures are identified from adaptive smoothing of galaxy counts in the pseudo-3d space (,z) using the COSMOS photometric redshift catalog. The technique is tested on a simulation including galaxies distributed in model clusters and a field galaxy population -- recovering structures on all scales from 1 to 20\arcmin without {\it a priori} assumptions for the structure size or density profile. Our procedure makes {\bf no} {\it a priori} selection on galaxy spectral energy distribution (SED, for example the Red Sequence), enabling an unbiased investigation of environmental effects on galaxy evolution. The COSMOS photometric redshift catalog yields a sample of galaxies with redshift accuracy, at z down to I mag. Using this sample of galaxies, we identify 42 large-scale structures and clusters. abstract truncated for astroph 25 line limit -- see preprint
Keywords
Cite
@article{arxiv.astro-ph/0612384,
title = {Large Structures and Galaxy Evolution in COSMOS at z < 1.1},
author = {N. Scoville and H. Aussel and A. Benson and A. Blain and D. Calzetti and P. Capak and R. S. Ellis and A. El-Zant and A. Finoguenov and M. Giavalisco and L. Guzzo and G. Hasinger and J. Koda and O. Lefevre and R. Massey and H. J. McCracken and B. Mobasher and A. Renzini and J. Rhodes and M. Salvato and D. B. Sanders and S. S. Sasaki and E. Schinnerer and K. Sheth and P. L. Shopbell and Y. Taniguchi and J. E. Taylor and D. J. Thompson},
journal= {arXiv preprint arXiv:astro-ph/0612384},
year = {2009}
}
Comments
72 pages with 29 pages of figures, for cosmos apj suppl special issue