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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 421598.0, MPI für Astronomie / Publikationen_mpia
GMASS, Unveiling Distant Massive Galaxies with Spitzer
Authors:Kurk, J. D.; Cimatti, A.; Daddi, E.; Dickinson, M.; Mignoli, M.; Pozzetti, L.; Bolzonella, M.; Berta, S.; Zamorani, G.; Cassata, P.; Rodighiero, G.; Franceschini, A.; Renzini, A.; Rosati, P.
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution
Start Page:303
End Page:308
Volume (in Series):381
Name of Conference/Meeting:Infrared Diagnostics of Galaxy Evolution
Audience:Not Specified
Abstract / Description:One of the main questions of galaxy formation is how and when galaxies assembled their mass. Observations suggest that most mass assembly and star formation occured at 1 < z < 3. However, in the same redshift range, fully assembled old and massive galaxies co-exist with star-bursting systems still in their assembling stage. In order to explore galaxy evolution in this critical redshift range, we started a project called GMASS (Galaxy Mass Assembly ultra-deep Spectroscopic Survey) based on an 145 hours ESO Large Program and aimed at doing ultradeep spectroscopy with the VLT of a sample of high redshift galaxies slected with IRAC/Spitzer (m_{AB}(4.5mum) < 23, z_{phot} > 1.4) from the GOODS-South/HUDF region. The selection at 4.5mum is crucial to select high redshift galaxies based on the stellar mass or objects affected by strong dust extinction. The spectroscopic deep integration times (15 - 50 hours) are needed to identify unambiguously the redshift and nature of these galaxies, which redshifts are mostly in the desert where spectroscopy is traditionally difficult due to the absence of strong emission lines at optical wavelengths. The survey is almost complete and some preliminary results are presented here.
Comment of the Author/Creator:Date: 2008, March 1, 2008
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
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