Clustering of Star-forming Galaxies Near a Radio Galaxy at z=5.2

Abstract

We present HST/ACS observations of the most distant radio galaxy known, TN J0924-2201 at z=5.2. This radio galaxy has 6 spectroscopically confirmed Lya emitting companion galaxies, and appears to lie within an overdense region. The radio galaxy is marginally resolved in i_775 and z_850 showing continuum emission aligned with the radio axis, similar to what is observed for lower redshift radio galaxies. Both the half-light radius and the UV star formation rate are comparable to the typical values found for Lyman break galaxies at z~4-5. The Lya emitters are sub-L* galaxies, with deduced star formation rates of 1-10 Msun/yr. One of the Lya emitters is only detected in Lya. Based on the star formation rate of ~3 Msun/yr calculated from Lya, the lack of continuum emission could be explained if the galaxy is younger than ~2 Myr and is producing its first stars. Observations in V_606, i_775, and z_850 were used to identify additional Lyman break galaxies associated with this structure. In addition to the radio galaxy, there are 22 V-break (z~5) galaxies with z_850<26.5 (5sigma), two of which are also in the spectroscopic sample. We compare the surface density of 2/arcmin^2 to that of similarly selected V-dropouts extracted from GOODS and the UDF Parallel fields. We find evidence for an overdensity to very high confidence (>99%), based on a counts-in-cells analysis applied to the control field. The excess is suggestive of the V-break objects being associated with a forming cluster around the radio galaxy.

39 pages (15 figures). Accepted to ApJ. Full resolution version available at http://acs.pha.jhu.edu/science/papers/

References in corpus (69)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• 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
• Simulating the joint evolution of quasars, galaxies and their large-scale distribution
• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• The Demography of Massive Dark Objects in Galaxy Centres
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• Large scale bias and the peak background split
• High Redshift Galaxies in the Hubble Deep Field. Color Selection and Star Formation History to z=4
• The Great Observatories Origins Deep Survey: Initial Results From Optical and Near-Infrared Imaging
• Lyman Break Galaxies at z>4 and the Evolution of the UV Luminosity Density at High Redshift
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
• The Star Formation History of Field Galaxies
• Bayesian photometric redshift estimation
• The Photometric Performance and Calibration of the HST Advanced Camera For Surveys
• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey II: Discovery of Three Additional Quasars at z>6
• Lyman Alpha Imaging of a Proto-Cluster Region at <z>=3.09
• A Large Structure of Galaxies At Redshift z~3 and its Cosmological Implications
• The Stellar Populations and Evolution of Lyman Break Galaxies
• The Evolution of Early-Type Galaxies in Distant Clusters
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The Rest-Frame UV Luminosity Density of Star-Forming Galaxies at Redshifts z>3.5
• The Morphology - Density Relation in z ~ 1 Clusters
• The Size Evolution of High Redshift Galaxies
• Cosmic Variance in the Great Observatories Origins Deep Survey
• The Angular Clustering of Lyman-Break Galaxies at Redshift z=3
• A Counts-in-Cells Analysis of Lyman-break Galaxies at z~3
• Discovery of an X-ray-Luminous Galaxy Cluster at z=1.4
• Galaxy Size Evolution at High Redshift and Surface Brightness Selection Effects: Constraints from the Hubble Ultra Deep Field
• The Discovery of Primeval Large-Scale Structures with Forming Clusters at Redshift 6
• Advanced Camera for Surveys Photometry of the Cluster RDCS1252.9-2927: The Color-Magnitude Relation at z=1.24
• Faint Galaxies in deep ACS observations
• The most distant structure of galaxies known: a protocluster at z=4.1
• Triggered Star Formation in a Massive Galaxy at z=3.8: 4C41.17
• A Sample of 669 Ultra Steep Spectrum Radio Sources to Find High Redshift Radio Galaxies
• HST, radio and infrared observations of 28 3CR radio galaxies at redshift z ~ 1: I. Old stellar populations in central cluster galaxies
• Subaru Deep Survey VI. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Clustering Properties
• Spectroscopic Identification of a Proto-Cluster at z=2.300: Environmental Dependence of Galaxy Properties at High Redshift
• Jet-Induced Emission-Line Nebulosity and Star Formation in the High-Redshift Radio Galaxy 4C41.17
• Properties of Ly-alpha emitters around the radio galaxy MRC 0316-257
• Clustering Segregation With UV Luminosity in Lyman-Break Galaxies at z~3 and Its Implications
• A Radio Galaxy at z=5.19
• Optical and Near-IR Imaging of Ultra Steep Spectrum Radio Sources - The K-z diagram of radio and optically selected galaxies
• A Faint Star-Forming System Viewed Through the Lensing Cluster Abell 2218: First Light at z~5.6?
• Giant Lya nebulae associated with high redshift radio galaxies
• Subaru Deep Survey. IV. Discovery of a Large-Scale Structure at Redshift \simeq 5
• Star Formation at z~6: The UDF-Parallel ACS Fields
• A large population of 'Lyman-break' galaxies in a protocluster at redshift z=4.1
• NICMOS observations of high redshift radio galaxies: witnessing the formation of bright elliptical galaxies?
• Discovery of six Ly alpha emitters near a radio galaxy at z ~ 5.2
• Luminous Lyman Break Galaxies at z>5 and the Source of Reionization
• Evidence for Large-Scale Structure at z=2.4 From Lyman-alpha Imaging
• A Pair of Compact Red Galaxies at Redshift 2.38, Immersed in a 100 kpc Scale Ly-alpha Nebula
• Evidence for Primordial Clustering Around the QSO SDSS J1030+0524 at z=6.28
• The Clustering Properties of Lyman-Break Galaxies at Redshift z~3
• The Fundamental Plane of Cluster Ellipticals at z = 1.25
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• The Serendipitous Discovery of a Group or Cluster of young Galaxies at z=2.40 in Deep Hubble Space Telescope WFPC2 Images
• The detailed Fundamental Plane of two high redshift clusters: MS 2053-04 at z=0.58 and MS 1054-03 at z=0.83
• X-ray nondetection of the Lyman-alpha Emitters at z ~ 4.5
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• Detection of a redshift 3.04 filament
• Discovery of a Clustered Quasar Pair at z ~ 5: Biased Peaks in Early Structure Formation
• Cluster of galaxies around seven radio-loud QSOs at 1<z<1.6: K-band images

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• Witnessing the formation of a brightest cluster galaxy at z>2
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• Can luminous Lyman alpha emitters at $z$ $\simeq$ 5.7 and $z$ $\simeq$ 6.6 suppress star formation?
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