2006A&A...456..433I


Query : 2006A&A...456..433I

2006A&A...456..433I - Astronomy and Astrophysics, volume 456, 433-437 (2006/9-3)

Large-scale structure of Lyman break galaxies around a radio galaxy protocluster at z∼4.

INTEMA H.T., VENEMANS B.P., KURK J.D., OUCHI M., KODAMA T., ROETTGERING H.J.A., MILEY G.K. and OVERZIER R.A.

Abstract (from CDS):

We present broad-band imaging with the Subaru Telescope of a 25'x25' field surrounding the radio galaxy TN J1338-1942 at redshift z=4.1. The field contains excesses of Lyman-α emitters (LAEs) and Lyman break galaxies (LBGs) identified with a protocluster surrounding the radio galaxy. Our new wide-field images provide information about the boundary of the protocluster and its surroundings. There are 874 candidate LBGs within our field, having redshifts in the range z=3.5-4.5. An examination of the brightest of these (with i'<25.0) shows that the most prominent concentration coincides with the previously discovered protocluster. The diameter of this galaxy overdensity corresponds to ∼2Mpc at z=4, consistent with the previous estimation using LAEs. Several other concentrations of LBGs are observed in the field, some of which may well be physically connected with the z=4.1 protocluster. The observed structure in the smoothed LBG distribution can be explained as the projection of large-scale structure, within the redshift range z=3.5-4.5, comprising compact overdensities and prominent larger voids. If the 5-8 observed compact overdensities are associated with protoclusters, the observed protocluster volume density is ∼5x10–6Mpc–3, similar to the volume density of rich clusters in the local Universe.

Abstract Copyright:

Journal keyword(s): cosmology: observations - early Universe - galaxies: clusters: general - galaxies: high-redshift

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME SXDSF reg 02 18 00 -05 00.0           ~ 211 1
2 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 317 1
3 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 94 0

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2023.01.27-12:06:32

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