2006ApJ...637...58O


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET23:13:16

2006ApJ...637...58O - Astrophys. J., 637, 58-73 (2006/January-3)

Clustering of star-forming galaxies near a radio galaxy at z=5.2.

OVERZIER R.A., MILEY G.K., BOUWENS R.J., CROSS N.J.G., ZIRM A.W., BENITEZ N., BLAKESLEE J.P., CLAMPIN M., DEMARCO R., FORD H.C., HARTIG G.F., ILLINGWORTH G.D., MARTEL A.R., ROETTGERING H.J.A., VENEMANS B., ARDILA D.R., BARTKO F., BRADLEY L.D., BROADHURST T.J., COE D., FELDMAN P.D., FRANX M., GOLIMOWSKI D.A., GOTO T., GRONWALL C., HOLDEN B., HOMEIER N., INFANTE L., KIMBLE R.A., KRIST J.E., MEI S., MENANTEAU F., MEURER G.R., MOTTA V., POSTMAN M., ROSATI P., SIRIANNI M., SPARKS W.B., TRAN H.D., TSVETANOV Z.I., WHITE R.L. and ZHENG W.

Abstract (from CDS):

We present HST ACS observations of the most distant radio galaxy known, TN J0924-2201 at z=5.2. This radio galaxy has six spectroscopically confirmed Lyα-emitting companion galaxies and appears to lie within an overdense region. The radio galaxy is marginally resolved in i775 and z850, 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 Lyα emitters are sub-L*galaxies, with deduced star formation rates of 1-10 M/yr. One of the Lyα emitters is only detected in Lyα. Based on the star formation rate of ∼3 M/yr calculated from Lyα, the lack of continuum emission could be explained if the galaxy is younger than ∼2 Myr and is producing its first stars. Observations in V606i775z850were used to identify additional Lyman break galaxies associated with this structure. In addition to the radio galaxy, there are 22 V606break (z∼5) galaxies with z850<26.5 (5 σ), two of which are also in the spectroscopic sample. We compare the surface density of ∼2/arcmin2 to that of similarly selected V606dropouts 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 suggests that the V606break objects are associated with a forming cluster around the radio galaxy.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - Cosmology: Early Universe - Galaxies: Clusters: General - Galaxies: High-Redshift - Galaxies: Individual: Alphanumeric: TN J0924-2201 - Galaxies: Starburst - Cosmology: Large-Scale Structure of Universe

Nomenclature: Table 3, Fig.9: [OMB2006] NNNN N=23 among (Nos 119-1979).

Simbad objects: 30

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Number of rows : 30

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1780 1
2 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1250 0
3 [OMB2006] 1979 EmG 09 24 12.50 -22 02 45.5           ~ 2 0
4 [OMB2006] 1898 EmG 09 24 14.17 -22 02 15.9           ~ 2 0
5 [OMB2006] 1802 EmG 09 24 14.92 -22 02 15.8           ~ 2 0
6 [OMB2006] 1873 EmG 09 24 15.17 -22 01 53.2           ~ 2 0
7 [OMB2006] 1844 EmG 09 24 16.68 -22 01 16.9           ~ 3 0
8 [OMB2006] 1736 EmG 09 24 18.92 -22 00 42.2           ~ 2 0
9 [OMB2006] 1385 EmG 09 24 19.31 -22 02 01.8           ~ 2 0
10 [OMB2006] 1814 EmG 09 24 19.78 -22 59 58.1           ~ 2 0
11 [DVR2000] TN J0924-2201 rG 09 24 19.94 -22 01 42.2       25.850   ~ 77 0
12 [OMB2006] 1074 EmG 09 24 21.24 -22 02 21.6           ~ 2 0
13 [OMB2006] 1047 EmG 09 24 22.19 -22 01 59.6           ~ 2 0
14 [OMB2006] 894 EmG 09 24 23.15 -22 02 16.6           ~ 2 0
15 [OMB2006] 449 EmG 09 24 23.88 -22 03 44.8           ~ 3 0
16 [OMB2006] 670 EmG 09 24 25.41 -22 02 07.2           ~ 2 0
17 [OMB2006] 505 EmG 09 24 25.42 -22 02 48.0           ~ 2 0
18 [OMB2006] 739 EmG 09 24 25.76 -22 01 43.0           ~ 2 0
19 [OMB2006] 871 EmG 09 24 25.76 -22 01 11.4           ~ 2 0
20 [OMB2006] 595 EmG 09 24 27.00 -22 01 37.6           ~ 2 0
21 [OMB2006] 310 EmG 09 24 28.10 -22 02 18.1           ~ 2 0
22 [OMB2006] 444 EmG 09 24 28.11 -22 01 47.4           ~ 2 0
23 [OMB2006] 510 EmG 09 24 28.81 -22 01 12.2           ~ 2 0
24 [OMB2006] 303 EmG 09 24 29.03 -22 01 53.2           ~ 2 0
25 [OMB2006] 119 EmG 09 24 29.06 -22 02 41.1           ~ 2 0
26 NAME Spiderweb Galaxy AGN 11 40 48.3 -26 29 09     22.00     ~ 248 1
27 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1818 1
28 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 897 1
29 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 88 0
30 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 775 1

    Equat.    Gal    SGal    Ecl

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2020.02.17-23:13:16

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