2011MNRAS.417.1088K

Query : 2011MNRAS.417.1088K

2011MNRAS.417.1088K - Mon. Not. R. Astron. Soc., 417, 1088-1097 (2011/October-3)

Discovery of a high-z protocluster with tunable filters: the case of 6C0140+326 at z= 4.4.

KUIPER E., HATCH N.A., VENEMANS B.P., MILEY G.K., ROTTGERING H.J.A., KURK J.D., OVERZIER R.A., PENTERICCI L., BLAND-HAWTHORN J. and CEPA J.

Abstract (from CDS):

We present the first results obtained using a tunable narrow-band filter in the search for high-z protoclusters. Using the recently commissioned red tunable filter on the Gran Telescopio Canarias, we have searched for Lyα emitters in a 75 arcmin2 field centred on the z= 4.413 radio galaxy 6C0140+326. With three different wavelength tunings, we find a total of 27 unique candidate Lyα emitters. The availability of three different wavelength tunings allows us to make estimates of the redshifts for each of the objects. It also allows us to separate a possible protocluster from a structure in the immediate foreground. This division shows that the foreground region contains significantly fewer Lyα emitters. Also, the spatial distribution of the objects in the protocluster field deviates from a random distribution at the 2.5σ level. The observed redshift distribution of the emitters is different from the expected distribution of a blank field at the ∼ 3σ level, with the Lyα emitters concentrated near the radio galaxy at z > 4.38. The 6C0140+326 field is denser by a factor of 9±5 than a blank field, and the number density of Lyα emitters close to the radio galaxy is similar to that of the z∼ 4.1 protocluster around TN J1338-1942. We thus conclude that there is an overdensity of Lyα emitters around the radio galaxy 6C0140+326. This is one of few known overdensities at such a high redshift.

Abstract Copyright: 2011 The Authors. Monthly Notices of the Royal Astronomical Society2011 RAS

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

Nomenclature: NAME 6C0140 protocluster N=1. Tables 2-3: [KHV2011] NN (Nos 1-27).

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [KHV2011] 8 EmG 01 43 24.8 +32 54 10           ~ 1 0
2 [KHV2011] 27 EmG 01 43 25.9 +32 52 02           ~ 1 0
3 [KHV2011] 26 EmG 01 43 26.6 +32 52 17           ~ 1 0
4 [KHV2011] 25 EmG 01 43 27.3 +32 51 32           ~ 1 0
5 [KHV2011] 24 EmG 01 43 33.30 +32 54 09.0           ~ 1 0
6 [KHV2011] 7 EmG 01 43 35.4 +32 52 11           ~ 1 0
7 [KHV2011] 6 EmG 01 43 35.7 +32 54 36           ~ 1 0
8 [KHV2011] 23 EmG 01 43 36.1 +32 55 01           ~ 1 0
9 [KHV2011] 16 EmG 01 43 38.0 +32 49 52           ~ 1 0
10 [KHV2011] 22 EmG 01 43 38.0 +32 52 01           ~ 1 0
11 [KHV2011] 5 EmG 01 43 38.3 +32 49 58           ~ 1 0
12 [KHV2011] 4 EmG 01 43 38.9 +32 53 37           ~ 1 0
13 [KHV2011] 15 EmG 01 43 40.2 +32 55 03           ~ 1 0
14 [KHV2011] 14 EmG 01 43 41.0 +32 53 49           ~ 1 0
15 [KHV2011] 13 EmG 01 43 41.4 +32 53 49           ~ 1 0
16 [KHV2011] 12 EmG 01 43 41.5 +32 54 17           ~ 1 0
17 [KHV2011] 11 EmG 01 43 42.1 +32 55 28           ~ 1 0
18 [KHV2011] 10 EmG 01 43 43.3 +32 52 08           ~ 1 0
19 NAME 6C0140 Protocluster ClG 01 43 43.8 +32 53 50           ~ 3 0
20 NVSS J014343+325349 rG 01 43 43.85 +32 53 49.7         24 ~ 37 1
21 [KHV2011] 20 EmG 01 43 43.9 +32 52 29           ~ 1 0
22 [KHV2011] 2 EmG 01 43 44.6 +32 49 43           ~ 1 0
23 [KHV2011] 19 EmG 01 43 44.8 +32 56 02           ~ 1 0
24 [KHV2011] 3 EmG 01 43 44.8 +32 57 06           ~ 1 0
25 [KHV2011] 9 EmG 01 43 45.90 +32 53 58.0           ~ 1 0
26 [KHV2011] 18 EmG 01 43 56.4 +32 54 41           ~ 1 0
27 [KHV2011] 1 EmG 01 43 58.2 +32 49 50           ~ 1 0
28 [KHV2011] 17 EmG 01 43 59.8 +32 52 16           ~ 1 0
29 GLEAM J092419-220140 QSO 09 24 19.92000 -22 01 41.4984       25.850   ~ 90 1
30 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 106 0
31 ClG J1449+0856 ClG 14 49.0 +08 56           ~ 70 0

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