The Hubble Space Telescope GOODS NICMOS Survey: Overview and the Evolution of Massive Galaxies at 1.5 < z < 3 - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




The Hubble Space Telescope GOODS NICMOS Survey: Overview and the Evolution of Massive Galaxies at 1.5 < z < 3 - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We present the details and early results from a deep near-infrared surveyutilising the NICMOS instrument on the Hubble Space Telescope centred aroundmassive M * > 10^11 M 0 galaxies at 1.7 < z < 2.9 found within the GreatObservatories Origins Deep Survey GOODS fields. The GOODS NICMOS Survey GNSwas designed to obtain deep F160W H-band imaging of 80 of these massivegalaxies, as well as other colour selected objects such as Lyman-breakdrop-outs, BzK objects, Distant Red Galaxies, EROs, Spitzer Selected EROs,BX-BM galaxies, as well as sub-mm galaxies. We present in this paper details ofthe observations, our sample selection, as well as a description of features ofthe massive galaxies found within our survey fields. This includes: photometricredshifts, rest-frame colours, and stellar masses. We furthermore provide ananalysis of the selection methods for finding massive galaxies at highredshifts, including colour selection, and how galaxy populations selectedthrough different methods overlap. We find that a single colour selectionmethod cannot locate all of the massive galaxies, with no one method findingmore than 70 percent. We however find that the combination of these colourmethods finds nearly all the massive galaxies, as selected by photometricredshifts with the exception of apparently rare blue massive galaxies. Byinvestigating the rest-frame U-B vs. M B diagram for these galaxies wefurthermore show that there exists a bimodality in colour-magnitude space at z< 2, driven by stellar mass, such that the most massive galaxies aresystematically red up to z~2.5, while lower mass galaxies tend to be blue. Wealso discuss the number densities for galaxies with stellar masses M * > 10^11M 0, whereby we find an increase of a factor of eight between z = 3 and z =1.5, demonstrating that this is an epoch when massive galaxies establish mostof their mass.



Autor: C.J. Conselice, A.F.L. Bluck, F. Buitrago, A.E. Bauer, R. Grützbauch, R.J. Bouwens, S. Bevan, A. Mortlock, M. Dickinson, E. Dadd

Fuente: https://arxiv.org/







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