2004/11/05 by L. Felipe Barrientos, Michael D. Gladders, H. K. C. Yee +7
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Brightest cluster galaxy #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Gamma-ray bursts and supernovae #Magnitude (astronomy) #Physics #Redshift #Spectroscopy #astro-ph
paper · pdf · doi:10.1086/427066
published as Astrophys.J. 617 (2004) L17-L20 · 12 pages, 1 color figure. Accepted for publication on The ApJ Letters
arxiv created 2004/11/05 · openalex publication_date 2004/11/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present deep I , J s , K s imaging and optical spectroscopy of the newly discovered Red-Sequence Cluster Survey cluster RCS 043938-2904.9. This cluster, drawn from an extensive preliminary list, was selected for detailed study on the basis of its apparent optical richness. Spectroscopy of 11 members places the cluster at z = 0.951 ± 0.006 and confirms the photometric redshift estimate from the ( R - z ) color-magnitude diagram. Analysis of the infrared imaging data demonstrates that the cluster is extremely rich, with excess counts in the K s band exceeding the expected background counts by 9 σ. The properties of the galaxies in RCS 043938-2904.9 are consistent with those seen in other clusters at similar redshifts. Specifically, the red-sequence color, slope, and scatter and the size-magnitude relation of these galaxies are all consistent with that seen in the few other known high-redshift clusters and indeed are consistent with appropriately evolved properties of local cluster galaxies. The apparent consistency of these systems implies that the rich high-redshift RCS clusters are directly comparable to the few other systems known at z ~ 1, most of which have been selected on the basis of X-ray emission.