2004ApJ...612L..93Y

Query : 2004ApJ...612L..93Y

2004ApJ...612L..93Y - Astrophys. J., 612, L93-L96 (2004/September-2)

Candidates of z∼5.5-7 galaxies in the Hubble Space Telescope Ultra Deep Field.

YAN H. and WINDHORST R.A.

Abstract (from CDS):

We report results from our z≃5.5-7 galaxy search in the Hubble Space Telescope Ultra Deep Field (UDF). Using the 400 orbit of Advanced Camera for Surveys data, we found 108 plausible 5.5≤z≤6.5 (or z≃6 for short) candidates to mAB(z850)=30.0 mag. The contamination to the sample, due to either image artifacts or known types of astronomical objects, is likely negligible. The inferred surface densities of z≃6 galaxies are consistent with our earlier predictions from mAB(z850)=26.5 to 28.5 mag. After correcting for detection incompleteness, the counts of z≃6 candidates to mAB(z850)=29.2 mag suggest that the faint-end slope of the galaxy luminosity function (LF) at this redshift is likely between α=-1.8 and -1.9, which is sufficient to account for the entire Lyman photon budget necessary to complete the reionization of the universe at z≃6. We also searched for z≃6.5-7 candidates using the UDF Near-Infrared Camera and Multi-Object Spectrometer data and have found four candidates to a magnitude of J110=27.2. However, the infrared colors of three candidates cannot be easily explained by galaxies in this redshift range. We tentatively derive an upper limit to the cumulative surface density of galaxies at z≃7 of 0.36/arcmin2 to a magnitude of J110=26.6, which suggests a noticeable drop in the LF amplitude from z≃6 to z≃7.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Cosmology: Early Universe - Galaxies: Evolution - Galaxies: High-Redshift - Galaxies: Luminosity Function, Mass Function

VizieR on-line data: <Available at CDS (J/ApJ/612/L93): table1.dat>

Nomenclature: Table 1: [YW2004] NNNa (Nos 1-102) N=108. Table 2: [YW2004] Dropout N (Nos 1-3).

Simbad objects: 112

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Number of rows : 112
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 UDF 4353 G 03 32 29.452 -27 47 40.52   30.9569 30.674     ~ 8 0
2 JADES-GS+053.12487-27.78413 EmG 03 32 29.973 -27 47 02.80           ~ 14 0
3 JADES-GS+053.12731-27.78805 EmG 03 32 30.550 -27 47 16.69           ~ 8 0
4 [CBS2006] 57089 G 03 32 30.686 -27 46 54.88     30.877     ~ 2 0
5 JADES-GS+053.13044-27.80236 EmG 03 32 31.304 -27 48 08.28   30.0154 30.79     ~ 12 0
6 [BIB2006] HUDF-31558139 G 03 32 31.55 -27 48 14.0           ~ 2 0
7 UDF 36298 G 03 32 31.748 -27 46 50.49           ~ 2 0
8 JADES-GS NC 206890 EmG 03 32 32.358 -27 47 02.83   31.66       ~ 7 0
9 JADES-GS+053.13600-27.79849 EmG 03 32 32.618 -27 47 54.09   31.51 31.20     ~ 22 1
10 JADES-GS+053.13633-27.77705 EmG 03 32 32.720 -27 46 37.25   31.90       ~ 8 0
11 GLARE 1054 EmG 03 32 33.207 -27 46 43.28     31.91     ~ 14 0
12 [BIB2006] HUDF-33338241 G 03 32 33.330 -27 48 24.15   33.67       ~ 5 0
13 MUSE-WIDE 613234218 EmG 03 32 33.427 -27 47 44.88   31.25 31.33     ~ 16 0
14 UDF 8904 G 03 32 33.555 -27 46 44.17 28.5553 28.5714 28.840     ~ 5 0
15 JADES-GS NC 110739 EmG 03 32 33.780 -27 48 07.59     33.24     ~ 17 0
16 [RTG2015] 2009 G 03 32 34.002 -27 48 25.01           ~ 8 0
17 [BIB2006] HUDF-34087575 G 03 32 34.086 -27 47 57.55           ~ 4 0
18 GOODS-MUSIC 10778 EmG 03 32 34.094 -27 46 47.21     30.55     ~ 20 0
19 JADES-GS NC 107767 EmG 03 32 34.140 -27 48 24.35   31.65       ~ 7 0
20 [RTG2015] 9704 G 03 32 34.191 -27 46 39.05           ~ 5 0
21 [TIB2005] 80 G 03 32 34.27460 -27 47 52.6433           ~ 6 0
22 UDF 3450 G 03 32 34.283 -27 47 52.27   32.37 32.32     ~ 13 0
23 UDF 3503 G 03 32 34.306 -27 47 53.56     30.95     ~ 13 0
24 [RTG2015] 5881 G 03 32 34.475 -27 47 35.07           ~ 6 0
25 UDF 33268 EmG 03 32 34.526 -27 47 34.86           ~ 6 0
26 [BIB2006] CDFS-2345447559 G 03 32 34.53186 -27 47 55.9598     31.84     ~ 13 1
27 JADES-GS NC 207015 EmG 03 32 34.5845 -27 46 58.271   31.214 31.193     ~ 4 0
28 JADES-GS NC 117868 EmG 03 32 35.045 -27 47 25.82     31.807   29.03 ~ 9 0
29 JADES-GS NC 203787 EmG 03 32 35.056 -27 47 40.19     30.59   27.83 ~ 17 0
30 [RTG2015] 2902 G 03 32 35.082 -27 48 06.83     30.90     ~ 9 0
31 UDF 31793 G 03 32 35.096 -27 48 09.12           ~ 5 0
32 [BIB2006] HUDF-35909027 G 03 32 35.904 -27 49 02.74   32.5812       ~ 4 0
33 [BIB2006] HUDF-36458342 G 03 32 36.43 -27 48 34.1           ~ 7 0
34 GOODS-MUSIC 10898 EmG 03 32 36.470 -27 46 41.44   29.56 31.02   26.54 ~ 25 0
35 [BSE2004] 42806 G 03 32 36.49 -27 46 41.4           ~ 4 0
36 [BIO2015] XDFI-2366247500 G 03 32 36.627 -27 47 50.07           ~ 10 0
37 [BIB2006] HUDF-36768569 G 03 32 36.764 -27 48 56.96           ~ 4 0
38 [BIB2006] HUDF-36777536 G 03 32 36.773 -27 47 53.59         28.98 ~ 17 0
39 JADES-GS+053.15407-27.76607 EmG 03 32 36.972 -27 45 57.60           ~ 27 0
40 JADES-GS+053.15516-27.76072 EmG 03 32 37.230 -27 45 38.37           ~ 14 0
41 [BIO2015] GSDZ-2372848546 G 03 32 37.277 -27 48 54.58   33.20 31.18     ~ 14 0
42 JADES-GS+053.15613-27.77584 EmG 03 32 37.464 -27 46 32.79   30.4935 29.65   27.72 ~ 19 0
43 [BSE2004] 44194 G 03 32 37.479 -27 46 32.49   30.64 28.74     ~ 10 0
44 JADES-GS+053.15705-27.77272 EmG 03 32 37.689 -27 46 21.54           ~ 13 0
45 UDF 30376 G 03 32 37.832 -27 49 05.87           ~ 3 0
46 [RTG2015] 615 G 03 32 38.016 -27 49 08.39         26.6623 ~ 13 1
47 [RTG2015] 7662 G 03 32 38.052 -27 45 48.81           ~ 6 0
48 JADES-GS+053.15900-27.79268 G 03 32 38.157 -27 47 33.37           ~ 7 0
49 [CBS2006] 35703 G 03 32 38.268 -27 46 18.45           ~ 7 0
50 [BIO2015] XDFI-2382747512 G 03 32 38.281 -27 47 51.31     32.28     ~ 10 0
51 JADES-GS+053.15953-27.77152 EmG 03 32 38.282 -27 46 17.22   29.3328 30.49     ~ 28 0
52 [RTG2015] 939 G 03 32 38.496 -27 48 57.82   31.99 33.36     ~ 10 0
53 JADES-GS+053.16062-27.77161 EmG 03 32 38.546 -27 46 17.53           ~ 29 0
54 UDF 30262 G 03 32 38.675 -27 49 12.89           ~ 3 0
55 NAME HUDF-J2 G 03 32 38.72681 -27 48 39.8845           ~ 26 1
56 [RTG2015] 6508 G 03 32 38.788 -27 47 10.81   30.4523       ~ 10 0
57 EIS-DEEP CDFS-4 J 1 1349 BD? 03 32 38.8006 -27 49 53.656           ~ 19 0
58 UDF 34266 G 03 32 38.861 -27 47 13.17   30.3471 31.80     ~ 7 0
59 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
60 GOODS J033239.06-274538.7 EmG 03 32 39.066 -27 45 38.75   30.7705 38.76     ~ 29 0
61 [RTG2015] 2279 G 03 32 39.128 -27 48 18.48           ~ 6 0
62 UDF 30129 G 03 32 39.243 -27 49 23.75           ~ 3 0
63 [BIB2006] HUDF-39407594 G 03 32 39.404 -27 47 59.40           ~ 5 0
64 [RTG2015] 6984 G 03 32 39.426 -27 47 02.59   30.6483       ~ 5 0
65 GLARE 1034 EmG 03 32 39.455 -27 45 43.42     32.11     ~ 14 0
66 [YW2004] 53 G 03 32 39.474 -27 48 40.08   31.713       ~ 6 0
67 MUSE-WIDE 723121079 EmG 03 32 39.503 -27 46 49.44           ~ 9 0
68 [CBS2006] 60145 G 03 32 39.517 -27 45 13.38   30.800       ~ 2 0
69 [BIB2006] HUDF-39796337 G 03 32 39.790 -27 46 33.75         29.10 ~ 10 0
70 GLARE 1004 AGN 03 32 39.864 -27 46 19.08   29.9603 32.55     ~ 26 0
71 CXOCDFS J033240.0-274815 EmG 03 32 40.013 -27 48 14.99     29.013   26.7186 ~ 55 0
72 [BSE2004] 19953 G 03 32 40.04 -27 48 14.6           ~ 6 0
73 GLARE 1060 G 03 32 40.060 -27 49 07.50   32.4846 31.24     ~ 10 0
74 [BIB2006] HUDF-40129369 G 03 32 40.125 -27 49 36.95     30.188     ~ 4 0
75 JADES-GS NC 136531 EmG 03 32 40.248 -27 46 05.20           ~ 11 0
76 [RTG2015] 2834 G 03 32 40.257 -27 48 08.11           ~ 6 0
77 JADES-GS+053.16853-27.77567 EmG 03 32 40.445 -27 46 32.13           ~ 9 0
78 [RTG2015] 7672 G 03 32 40.524 -27 45 46.47   31.049 30.741     ~ 6 0
79 JADES-GS+053.16900-27.80079 EmG 03 32 40.555 -27 48 02.59     32.72     ~ 14 0
80 JADES-GS+053.17010-27.79694 EmG 03 32 40.82676 -27 47 48.7361           ~ 7 0
81 MUSE-WIDE 613444244 EmG 03 32 40.831 -27 48 31.64           ~ 8 0
82 JADES-GS+053.17051-27.81249 EmG 03 32 40.916 -27 48 44.74   30.84       ~ 15 0
83 [BIB2006] HUDF-41186552 G 03 32 41.181 -27 46 55.18           ~ 8 0
84 GLARE 1030 G 03 32 41.185 -27 49 14.84     31.83     ~ 18 0
85 [BIB2006] HUDF-41329205 G 03 32 41.327 -27 49 20.45           ~ 4 0
86 [YW2004] 39a G 03 32 41.43 -27 46 01.2           ~ 1 0
87 [YW2004] 39b G 03 32 41.44 -27 46 01.3           ~ 1 0
88 JADES-GS+053.17324-27.79567 EmG 03 32 41.571 -27 47 44.21     30.43     ~ 15 0
89 JADES-GS+053.17582-27.77446 EmG 03 32 42.191 -27 46 27.82         28.77 ~ 22 0
90 UDF 30263 G 03 32 42.205 -27 49 12.00   31.0039       ~ 10 0
91 UDF 34987 G 03 32 42.562 -27 46 56.61         28.13 ~ 44 0
92 GLARE 1045 EmG 03 32 42.595 -27 48 08.82           ~ 14 0
93 [BIB2006] HUDF-42718118 G 03 32 42.713 -27 48 11.80     31.728     ~ 4 0
94 JADES-GS+053.17829-27.77728 EmG 03 32 42.786 -27 46 37.93           ~ 9 0
95 JADES-GS+053.17834-27.80097 EmG 03 32 42.797 -27 48 03.25           ~ 18 0
96 NAME HUDF-JD1 AGN 03 32 42.885 -27 48 09.51   31.2665 29.09   29.527 ~ 35 0
97 MUSE-WIDE 613754278 EmG 03 32 43.026 -27 46 23.65         28.03 ~ 12 0
98 JADES-GS NC 106817 EmG 03 32 43.164 -27 48 29.57     32.14     ~ 8 0
99 [BIB2006] HUDF-43786337 G 03 32 43.784 -27 46 33.71         29.16 ~ 12 0
100 JADES-GS NS 40649 EmG 03 32 44.138 -27 48 27.09           ~ 10 0
101 UDF 34253 G 03 32 44.492 -27 47 13.73           ~ 3 0
102 JADES-GS NC 205903 EmG 03 32 44.700 -27 47 11.57   30.1392 30.68     ~ 9 0
103 [BIO2015] XDFI-2447046454 G 03 32 44.702 -27 46 45.45           ~ 8 0
104 JADES-GS+053.18744-27.77804 EmG 03 32 44.980 -27 46 40.69           ~ 10 0
105 JADES-GS NS 201867 EmG 03 32 45.156 -27 48 05.12     30.592     ~ 9 0
106 UDF 34716 G 03 32 45.330 -27 47 03.52   31.873       ~ 3 0
107 [BIB2006] HUDF-46177453 G 03 32 46.17 -27 47 45.3           ~ 2 0
108 [BIB2006] HUDF-47567113 G 03 32 47.554 -27 47 11.30           ~ 4 0
109 UDF 34757 G 03 32 47.720 -27 47 02.57           ~ 3 0
110 UDF 33946 G 03 32 47.810 -27 47 20.55           ~ 2 0
111 JADES-GS+053.19938-27.79627 EmG 03 32 47.849 -27 47 46.36   30.7075       ~ 10 0
112 [YW2004] 62 EmG 03 32 47.97 -27 47 05.1           ~ 3 0

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