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Kajisawa, M. Salvato, N. Scoville, O. Ilbert, O. Le Fe`vre, P. Capak, P. L. Shopbell, Q. Guo, R. Massey, S. Arnouts, S. D. M. White, S. J. Lilly, S. Manohar, V. Smol'cic, Y-J. Peng, Y. Taniguchi","submitted_at":"2013-03-26T22:36:53Z","abstract_excerpt":"Large-scale structures (LSS) out to z $< 3.0$ are measured in the Cosmic Evolution Survey (COSMOS) using extremely accurate photometric redshifts (photoz). The Ks-band selected sample (from Ultra-Vista) is comprised of 155,954 galaxies. Two techniques -- adaptive smoothing and Voronoi tessellation -- are used to estimate the environmental densities within 127 redshift slices. Approximately 250 statistically significant overdense structures are identified out to z $= 3.0$ with shapes varying from elongated filamentary structures to more circularly symmetric concentrations. 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