2008/04/25 by J. Kurk, Jaron Kurk, A. Cimatti +39 · 2 citations
Mathematics · Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics (astro-ph) #FOS: Physical sciences #Field (mathematics) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Mathematics #Physics #Redshift #Redshift survey #Scientific Research and Discoveries #Stars #Velocity dispersion #astro-ph
paper · pdf · doi:10.48550/arxiv.0804.4126
published in arXiv (Cornell University) (Cornell University) · 4 pages, 1 figure, proceedings of the first Subaru International Conference: "Panoramic Views of Galaxy Formation and Evolution", in Hayama, Japan, December 2007
arxiv created 2008/04/25 · openalex publication_date 2008/04/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Galaxy Mass Assembly ultra-deep Spectroscopic Survey samples a part of the CDFS to unprecedented depth. The resulting distribution of 150 z>1.4 redshifts reveals a significant peak at z=1.6, part of a larger overdensity found at this redshift. The 42 spectroscopic members of this structure, called Cl 0332-2742, form an overdensity in redshift of a factor 11+/-3 and have a velocity dispersion of 450 km/s. We derive a total mass for Cl 0332-2742 of ~7x1014 Msol. The colours of its early-type galaxies are consistent with a theoretical red sequence of galaxies with stars formed at z=3.0. In addition, there are more massive, passive and older, but less star forming galaxies in CL 0332-2742 than in the field. We conclude that this structure is a cluster under assembly at z=1.6.