On the Stellar Populations in Faint Red Galaxies in the Hubble Ultra Deep Field

Abstract

We study the nature of faint, red-selected galaxies at z ~ 2-3 using the Hubble Ultra Deep Field (HUDF) and Spitzer IRAC photometry. We detect candidate galaxies to H < 26 mag, probing lower-luminosity (lower mass) galaxies at these redshifts. We identify 32 galaxies satisfying the (J - H) > 1.0 mag color selection, 16 of which have unblended [3.6um] and [4.5um] IRAC photometry. We derive photometric redshifts, masses, and stellar population parameters for these objects. We find that the selected objects span a diverse range of properties over a large range of redshifts, 1 < z < 3.5. A substantial fraction (11/32) appear to be lower-redshift (z < 2.5), heavily obscured dusty galaxies or edge-on spiral galaxies, while others (12/32) appear to be galaxies at 2 < z < 3.5 whose light at rest-frame optical wavelengths is dominated by evolved stellar populations. Interestingly, by including Spitzer data many candidates for galaxies dominated by evolved stellar populations are rejected, and for only a subset of the sample (6/16) do the data favor this interpretation. We place an upper limit on the space and stellar mass density of candidate massive evolved galaxies. The z > 2.5 objects that are dominated by evolved stellar populations have a space density at most one-third that of z ~ 0 red, early-type galaxies. Therefore, at least two-thirds of present-day early-type galaxies assemble or evolve into their current configuration at redshifts below 2.5. We find a dearth of candidates for low-mass galaxies at 1.5 < z < 3 that are dominated by passively evolving stellar populations even though the data should be sensitive to them; thus, at these redshifts, galaxies whose light is dominated by evolved stellar populations are restricted to only those galaxies that have assembled high stellar mass.[Abridged]

arXiv comment18 pages, 10 figures, and 4 tables. Accepted for publication in ApJ

References in corpus (60)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Stellar population synthesis at the resolution of 2003
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• The Hubble Deep Field: Observations, Data Reduction, and Galaxy Photometry
• The formation history of elliptical galaxies
• The Hubble Ultra Deep Field
• Passively Evolving Early-type Galaxies at 1.4<z<2.5 in the Hubble Ultra Deep Field
• The Chandra Deep Field-North Survey. XIII. 2 Ms Point-Source Catalogs
• The Nature of High-Redshift Galaxies
• The Stellar Populations and Evolution of Lyman Break Galaxies
• On the evolution of star forming galaxies
• The Rest-Frame Optical Properties of z~3 Galaxies
• The Evolution of the Global Stellar Mass Density at 0 < z < 3
• A Significant Population of Red, Near-IR Selected High Redshift Galaxies
• The Galaxy Mass Function up to z=4 in the GOODS-MUSIC sample: into the epoch of formation of massive galaxies
• IRAC Mid-Infrared Imaging of the Hubble Deep Field South: Star Formation Histories and Stellar Masses of Red Galaxies at z>2
• The Gemini Deep Deep Survey: III. The abundance of massive galaxies 3-6 billion years after the Big Bang
• Multiple Scattering in Clumpy Media. II. Galactic Environments
• The Spatial Clustering of Star-forming Galaxies at Redshifts 1.4<z<3.5
• The 24 Micron Source Counts in Deep Spitzer Surveys
• Spitzer Observations of Massive Red Galaxies at High Redshift
• UV to Mid-IR Observations of Star-forming Galaxies at z~2: Stellar Masses and Stellar Populations
• The K20 survey. I. Disentangling old and dusty star-forming galaxies in the ERO population
• The Rest-Frame Optical Luminosity Density, Color, and Stellar Mass Density of the Universe from z=0 to z=3
• Ultradeep Near-Infrared ISAAC Observations of the HDF-S: Observations, Reduction, Multicolor Catalog, and Photometric Redshifts
• An analytical model for the history of cosmic star formation
• Simulation of Stellar Objects in SDSS Color Space
• A Census of Optical and Near-Infrared Selected Star-Forming and Passively Evolving Galaxies at Redshift Z~2
• The Space Density and Colors of Massive Galaxies at 2<z<3: the Predominance of Distant Red Galaxies
• A Substantial Population of Red Galaxies at z > 2: Modeling of the Spectral Energy Distributions of an Extended Sample
• Candidates of z ~ 5.5--7 Galaxies in the HST Ultra Deep Field
• Evidence for a Massive Post-Starburst Galaxy at z ~ 6.5
• Galaxy Clustering and Galaxy Bias in a Lambda-CDM Universe
• Spectroscopic Confirmation of a Substantial Population of Luminous Red Galaxies at Redshifts z>2
• High-Redshift Extremely Red Objects in the HST Ultra Deep Field Revealed by the GOODS IRAC Observations
• Detection of strong clustering of red K-selected galaxies at 2<z_phot<4 in the Hubble Deep Field South
• The NICMOS Ultra Deep Field: Observations, Data Reduction, and Galaxy Photometry
• The rest-frame optical luminosity functions of galaxies at 2<z<3.5
• The Unusual Infrared Object HDF-N J123656.3+621322
• Measuring the Average Evolution of Luminous Galaxies at z<3: The Rest-frame Optical Luminosity Density, Spectral Energy Distribution, and Stellar Mass Density
• Morphologies and Spectral Energy Distributions of Extremely Red Galaxies in the GOODS-South Field
• The Diversity of Extremely Red Objects
• Clustering of K-selected Galaxies at 2<z<3.5: Evidence for a Color-Density Relation
• The Redshift Distribution of Near-IR Selected Galaxies in the Great Observatories Origins Deep Survey as a Test of Galaxy Formation Scenarios
• The Physical Properties and Detectability of Reionization-Epoch Galaxies
• Direct Measurements of the Stellar Continua and Balmer/4000 Angstrom Breaks of Red z>2 Galaxies: Redshifts and Improved Constraints on Stellar Populations
• A systematic search for very massive galaxies at z > 4
• Deep near-IR observations of the Chandra Deep Field and of the HDF-South - Color and Number Counts
• Distant red galaxies in the Hubble Ultra Deep Field
• Submillimeter observations of Distant Red Galaxies: uncovering the 1mJy 850um-population
• Star Formation in Distant Red Galaxies: Spitzer observations in the Hubble Deep Field South
• Discovery of Massive Evolved Galaxies at z > 3 in the Hubble Ultra Deep Field
• The Density and Spectral Energy Distributions of Red Galaxies at z~3.7
• Extremely Red Objects in The Lockman Hole
• HUDF-JD2: Mid-infrared Evidence for a z~2 Luminous Infrared Galaxy
• Chandra Constraints on the AGN Fraction and Star Formation Rate of Red z>~2 Galaxies in the FIRES MS1054-03 Field
• AEGIS: A Panchromatic Study of IRAC-selected Extremely Red Objects with Confirmed Spectroscopic Redshifts

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