Bibcode
Conselice, C. J.; Bluck, A. F. L.; Buitrago, F.; Bauer, A. E.; Grützbauch, R.; Bouwens, R. J.; Bevan, S.; Mortlock, A.; Dickinson, M.; Daddi, E.; Yan, H.; Scott, Douglas; Chapman, S. C.; Chary, R.-R.; Ferguson, H. C.; Giavalisco, M.; Grogin, N.; Illingworth, G.; Jogee, S.; Koekemoer, A. M.; Lucas, Ray A.; Mobasher, B.; Moustakas, L.; Papovich, C.; Ravindranath, S.; Siana, B.; Teplitz, H.; Trujillo, I.; Urry, M.; Weinzirl, T.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 413, Issue 1, pp. 80-100.
Advertised on:
5
2011
Número de citas
93
Número de citas referidas
81
Descripción
We present the details and early results from a deep near-infrared
survey utilizing the NICMOS instrument on the Hubble Space Telescope
centred around massive M* > 1011
M&sun; galaxies at 1.7 < z < 2.9 found within the Great
Observatories Origins Deep Survey (GOODS) fields North and South. The
GOODS NICMOS Survey (GNS) was designed to obtain deep F160W (H-band)
imaging of 80 of these massive galaxies and other colour-selected
objects such as Lyman-break dropouts, BzK objects, distant red galaxies
(DRGs), extremely red objects (EROs), Spitzer-selected EROs, BX/BM
galaxies, as well as flux-selected submillimetre galaxies. We present in
this paper details of the observations, our sample selection, as well as
a description of the properties of the massive galaxies found within our
survey fields. This includes photometric redshifts, rest-frame colours
and stellar masses. We furthermore provide an analysis of the selection
methods for finding massive galaxies at high redshifts, including
colour-selection methods and how galaxy populations selected through
these colour methods overlap. We find that a single colour selection
method cannot locate all of the massive galaxies, with no one method
finding more than 70 per cent. We however find that the combination of
these colour methods finds nearly all of the massive galaxies that would
have been identified in a photometric redshift sample, with the
exception of apparently rare blue massive galaxies. By investigating the
rest-frame (U-B) versus MB diagram for these galaxies, we
furthermore show that there exists a bimodality in colour-magnitude
space at z < 2, driven by stellar mass, such that the most massive
galaxies are systematically red up to z˜ 2.5, while lower mass
galaxies tend to be blue. We also discuss the number densities for
galaxies with stellar masses M* > 1011
M&sun;, whereby we find an increase of a factor of 8 between
z= 3 and 1.5, demonstrating that this is an epoch when massive galaxies
establish most of their stellar mass. We also provide an overview of the
evolutionary properties of these galaxies, such as their merger
histories, and size evolution.
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