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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 448333.0, MPI für Astronomie / Publikationen_mpia
Spectroscopic confirmation of a massive red-sequence-selected galaxy cluster at z = 1.34 in the SpARCS-South Cluster Survey
Authors:Wilson, Gillian; Muzzin, Adam; Yee, H. K. C.; Lacy, Mark; Surace, Jason; Gilbank, David; Blindert, Kris; Hoekstra, Henk; Majumdar, Subhabrata; Demarco, Ricardo; Gardner, Jonathan P.; Gladders, Michael D.; Lonsdale, Carol
Language:English
Date of Publication (YYYY-MM-DD):2009
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Volume:698
Issue / Number:2
Start Page:1943
End Page:1950
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey, consisting of deep (z' sime 24 AB) observations made from both hemispheres using the CFHT 3.6 m and CTIO 4 m telescopes. The survey was designed with the primary aim of detecting galaxy clusters at z > 1. In tandem with pre-existing 3.6 mum observations from the Spitzer Space Telescope SWIRE Legacy Survey, SpARCS detects clusters using an infrared adaptation of the two-filter red-sequence cluster technique. The total effective area of the SpARCS cluster survey is 41.9 deg2. In this paper, we provide an overview of the 13.6 deg2 Southern CTIO/MOSAIC II observations. The 28.3 deg2 Northern CFHT/MegaCam observations are summarized in a companion paper by Muzzin et al. In this paper, we also report spectroscopic confirmation of SpARCS J003550--431224, a very rich galaxy cluster at z = 1.335, discovered in the ELAIS-S1 field. To date, this is the highest spectroscopically confirmed redshift for a galaxy cluster discovered using the red-sequence technique. Based on nine confirmed members, SpARCS J003550--431224 has a preliminary velocity dispersion of 1050 ± 230 km s--1. With its proven capability for efficient cluster detection, SpARCS is a demonstration that we have entered an era of large, homogeneously selected z > 1 cluster surveys.
Free Keywords:cosmology: observations; galaxies: clusters: general; galaxies: high-redshift; infrared: galaxies; surveys
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009ApJ...698.1943W [ID No:1]
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