VizieR Online Data Catalog: Galaxy clusters and groups at z~1 (Lee+, 2019)

Our sample is drawn from high-redshift (0.5<z<2.0) cluster candidates that are selected from a 0.77deg² area of the entire UDS field. Our cluster-finding algorithm is described in Lee et al. (2015ApJ...810...90L). Briefly, galaxy cluster candidates are selected as overdense regions, where the galaxy surface number density is higher than the field value by more than 4σ at each redshift bin.

We obtain 46 cluster candidates, with halo masses of log(M₂₀₀/M_ȯ) in the range of [13.4,14.2]. Among the 46 cluster candidates, we selected targets for the multiobject spectroscopy using the Magellan Baade 6.5m Telescope at Las Campanas Observatory, Chile, based on (1) the SF property - covering a wide range in quiescent galaxy fraction, (2) redshift - residing at similar redshifts at z~1, and (3) their vicinity with each other - to be within the field of view (FoV) of the Inamori Magellan Areal Camera and Spectrograph (IMACS; Dressler et al. 2011PASP..123..288D) instrument. Based on these criteria, we select six cluster candidates that show different quiescent galaxy fractions while residing at similar redshifts, z~0.9 and 1.2 as our main targets.

(2 data files).