A spectroscopic study of a z=1.6 galaxy overdensity with GMASS

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dc.creatorKurk, Jaron
dc.creatorCimatti, Andrea
dc.creatorZamorani, Gianni
dc.creatorHalliday, Claire
dc.creatorMignoli, Marco
dc.creatorPozzetti, Lucia
dc.creatorDaddi, Emanuele
dc.creatorRosati, Piero
dc.creatorDickinson, Marc
dc.creatorBolzonella, Micol
dc.creatorCassata, Paolo
dc.creatorRenzini, Alvio
dc.creatorFranceschini, Alberto
dc.creatorRodighiero, Giulia
dc.creatorBerta, Stefano
dc.date2008-04-25
dc.date.accessioned2026-07-07T09:35:19Z
dc.date.available2026-07-07T09:35:19Z
dc.descriptionThe 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 ~7x10^14 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.
dc.description4 pages, 1 figure, proceedings of the first Subaru International Conference: "Panoramic Views of Galaxy Formation and Evolution", in Hayama, Japan, December 2007
dc.identifierhttps://arxiv.org/abs/0804.4126
dc.identifierhttp://arxiv.org/abs/0804.4126
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159797
dc.subjectAstrophysics
dc.titleA spectroscopic study of a z=1.6 galaxy overdensity with GMASS
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