SPECTROSCOPIC CONFIRMATION OF TWO MASSIVE RED-SEQUENCE-SELECTED GALAXY CLUSTERS AT z ∼ 1.2 IN THE SpARCS-NORTH CLUSTER SURVEY

By A. Muzzin, G. Wilson, H. Yee, H. Hoekstra, D. Gilbank, J. Surace, M. Lacy, K. Blindert, S. Majumdar, R. Demarco and 3 more. 2008

135 citations recorded by the source corpus.

The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a deep z′-band imaging survey covering the Spitzer Wide-Area Infrared Extragalactic Survey (SWIRE) Legacy fields designed to create the first large homogeneously selected sample of massive clusters at z > 1 using an infrared adaptation of the cluster red-sequence method. We present an overview of the northern component of the survey which has been observed with Canada–France–Hawaii Telescope (CFHT)/MegaCam and covers 28.3 deg2. The southern component of the survey was observed with Cerro Tololo Inter-American Observatory (CTIO)/MOSAICII, covers 13.6 deg2, and is summarized in a companion paper by Wilson et al. We also present spectroscopic confirmation of two rich cluster candidates at z ∼ 1.2. Based on Nod-and-Shuffle spectroscopy from GMOS-N on Gemini, there are 17 and 28 confirmed cluster members in SpARCS J163435+402151 and SpARCS J163852+403843 which have spectroscopic redshifts of 1.1798 and 1.1963, respectively. The clusters have velocity dispersions of 490 ± 140 km s−1 and 650 ± 160 km s−1, respectively, which imply masses (M200) of (1.0 ± 0.9) × 1014 M☉ and (2.4 ± 1.8) × 1014 M☉. Confirmation of these candidates as bonafide massive clusters demonstrates that two-filter imaging is an effective, yet observationally efficient, method for selecting clusters at z > 1.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/ccb05b3d691095853ec9e66e71bbf4587046298c

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Instrumentation

Citations in the corpus

Observational probes of cosmic acceleration (2012, background): “1.5 (e.g., Stanford et al., 2005; Brodwin et al., 2006; Eisenhardt et al., 2008; Muzzin et al., 2009; Wilson et al., 2009; Demarco et al., 2010), with some recent detections reaching z .”