2018ApJ...862...96L

Query : 2018ApJ...862...96L

2018ApJ...862...96L - Astrophys. J., 862, 96-96 (2018/August-1)

Ultra-red galaxies signpost candidate protoclusters at high redshift.

LEWIS A.J.R., IVISON R.J., BEST P.N., SIMPSON J.M., WEISS A., OTEO I., ZHANG Z.-Y., ARUMUGAM V., BREMER M.N., CHAPMAN S.C., CLEMENTS D.L., DANNERBAUER H., DUNNE L., EALES S., MADDOX S., OLIVER S.J., OMONT A., RIECHERS D.A., SERJEANT S., VALIANTE E., WARDLOW J., VAN DER WERF P. and DE ZOTTI G.

Abstract (from CDS):

We present images obtained with LABOCA of a sample of 22 galaxies selected via their red Herschel SPIRE colors. We aim to see if these luminous, rare, and distant galaxies are signposting dense regions in the early universe. Our 870 µm survey covers an area of ≃1 deg2 down to an average rms of 3.9mJybeam–1, with our five deepest maps going ≃2x deeper still. We catalog 86 dusty star-forming galaxies (DSFGs) around our "signposts," detected above a significance of 3.5σ. This implies a 100–30+30 % overdensity of S870> 8.5mJy (or LFIR=6.7×1012–2.9×1013L☉) DSFGs, excluding our signposts, when comparing our number counts to those in "blank fields." Thus, we are 99.93% confident that our signposts are pinpointing overdense regions in the universe, and ≃95% [50%] confident that these regions are overdense by a factor of at least >=1.5 x [2x]. Using template spectral energy distributions (SEDs) and SPIRE/LABOCA photometry, we derive a median photometric redshift of z = 3.2 ± 0.2 for our signposts, with an inter-quartile range of z = 2.8-3.6, somewhat higher than expected for ∼850 µm selected galaxies. We constrain the DSFGs that are likely responsible for this overdensity to within | Δz| ≤ 0.65 of their respective signposts. These "associated" DSFGs are radially distributed within (physical) distances of 1.6 ± 0.5 Mpc from their signposts, have median star formation rates (SFRs) of ~(1.0±0.2)×103M☉yr–1 (for a Salpeter stellar inital mass function) and median gas reservoirs of ∼1.7×1011M☉. These candidate protoclusters have average total SFRs of at least ~(2.3±0.5)×103M☉yr–1 and space densities of ∼9 x 10–7 Mpc–3, consistent with the idea that their constituents may evolve to become massive early-type galaxies in the centers of the rich galaxy clusters we see today.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: general - galaxies: high-redshift - galaxies: starburst - infrared: galaxies - submillimeter: galaxies

VizieR on-line data: <Available at CDS (J/ApJ/862/96): table1.dat table4.dat table5.dat>

Nomenclature: Tables 4-5: [LIB2018] LURGS JHHMMSS.s+DDMMSS N=108.

CDS comments: Figure 1: J2258-280 is PKS 2255-282.

Simbad objects: 119

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Number of rows : 119
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 [LIB2018] LURGS J000104.2-354123 G 00 01 04.20 -35 41 23.0           ~ 1 0
2 [LIB2018] LURGS J000115.9-354101 G 00 01 15.90 -35 41 01.3           ~ 1 0
3 [LIB2018] LURGS J000122.9-354211 G 00 01 22.91 -35 42 11.2           ~ 1 0
4 HerBS 41 G 00 01 24.9 -35 42 12           ~ 11 0
5 [LIB2018] LURGS J000129.4-354416 G 00 01 29.39 -35 44 15.7           ~ 1 0
6 [LIB2018] LURGS J000138.5-354402 G 00 01 38.50 -35 44 02.3           ~ 1 0
7 [LIB2018] LURGS J000145.0-353822 G 00 01 44.95 -35 38 22.1           ~ 1 0
8 [ACS2016] HELMS RED 10 G 00 03 04.17 +02 41 13.7           ~ 2 0
9 [LIB2018] LURGS J000319.2+023701 G 00 03 19.16 +02 37 00.7           ~ 1 0
10 [LIB2018] LURGS J000606.1-323016 G 00 06 06.14 -32 30 16.1           ~ 1 0
11 H-ATLAS J000607.6-322639 G 00 06 07.6 -32 26 39           ~ 3 0
12 [LIB2018] LURGS J000608.5-323338 G 00 06 08.47 -32 33 38.2           ~ 1 0
13 [LIB2018] LURGS J000619.9-322847 G 00 06 19.91 -32 28 46.8           ~ 1 0
14 [LIB2018] LURGS J000619.9-323126 G 00 06 19.92 -32 31 26.2           ~ 1 0
15 [LIB2018] LURGS J000621.3-323208 G 00 06 21.31 -32 32 07.9           ~ 1 0
16 H-ATLAS J000624.3-323019 G 00 06 24.3 -32 30 19           ~ 3 0
17 [LIB2018] LURGS J000634.0-323138 G 00 06 34.00 -32 31 38.1           ~ 1 0
18 [LIB2018] LURGS J002851.3-431353 G 00 28 51.31 -43 13 52.8           ~ 1 0
19 [LIB2018] LURGS J002904.0-430737 G 00 29 03.95 -43 07 37.2           ~ 1 0
20 [LIB2018] LURGS J002907.7-431036 G 00 29 07.74 -43 10 36.2           ~ 1 0
21 [LIB2018] LURGS J002913.4-430707 G 00 29 13.39 -43 07 07.0           ~ 1 0
22 [LIB2018] LURGS J002919.0-430817 G 00 29 19.01 -43 08 16.8           ~ 1 0
23 [LIB2018] LURGS J003347.9-451441 G 00 33 47.86 -45 14 40.8           ~ 1 0
24 [LIB2018] LURGS J003352.4-452015 G 00 33 52.39 -45 20 14.6           ~ 1 0
25 [LIB2018] LURGS J003410.4-452230 G 00 34 10.40 -45 22 29.7           ~ 1 0
26 H-ATLAS J003533.9-280302 G 00 35 33.9 -28 03 02           ~ 3 0
27 [LIB2018] LURGS J003536.4-280143 G 00 35 36.37 -28 01 43.3           ~ 1 0
28 [LIB2018] LURGS J003540.1-280459 G 00 35 40.07 -28 04 58.7           ~ 1 0
29 [LIB2018] LURGS J003744.9-421240 G 00 37 44.90 -42 12 39.6           ~ 1 0
30 [LIB2018] LURGS J003756.6-421519 G 00 37 56.62 -42 15 19.0           ~ 1 0
31 [LIB2018] LURGS J003808.4-421742 G 00 38 08.44 -42 17 41.7           ~ 1 0
32 [LIB2018] LURGS J003811.7-421908 G 00 38 11.74 -42 19 08.0           ~ 1 0
33 LEDA 107862 EmG 00 38 26.1507195960 -42 12 10.397896740   16.81   15.59   ~ 7 0
34 [LIB2018] LURGS J003831.5-421418 G 00 38 31.49 -42 14 18.4           ~ 1 0
35 [LIB2018] LURGS J004210.1-334040 G 00 42 10.09 -33 40 40.0           ~ 1 0
36 [LIB2018] LURGS J004212.9-334544 G 00 42 12.86 -33 45 43.5           ~ 1 0
37 [LIB2018] LURGS J004216.1-334138 G 00 42 16.11 -33 41 37.8           ~ 1 0
38 [LIB2018] LURGS J004219.8-334435 G 00 42 19.79 -33 44 35.2           ~ 1 0
39 [LIB2018] LURGS J004223.2-334117 G 00 42 23.25 -33 41 16.9           ~ 1 0
40 [LIB2018] LURGS J004223.5-334350 G 00 42 23.46 -33 43 49.6           ~ 1 0
41 H-ATLAS J004223.5-334340 G 00 42 23.56 -33 43 38.5           ~ 9 0
42 [LIB2018] LURGS J004223.7-334325 G 00 42 23.73 -33 43 25.0           ~ 1 0
43 [LIB2018] LURGS J004228.5-334925 G 00 42 28.53 -33 49 24.6           ~ 1 0
44 [LIB2018] LURGS J004233.2-334404 G 00 42 33.16 -33 44 04.2           ~ 1 0
45 [LIB2018] LURGS J004604.4-321844 G 00 46 04.41 -32 18 44.2           ~ 1 0
46 H-ATLAS J004615.0-321825 G 00 46 14.97 -32 18 24.6           ~ 4 0
47 [LIB2018] LURGS J004620.2-322009 G 00 46 20.19 -32 20 08.5           ~ 1 0
48 NAME SGP reg 00 51 26.275 -27 07 41.70           ~ 606 0
49 [ACS2016] HELMS RED 2 LeG 00 52 58.6 +06 13 19           ~ 5 0
50 [LIB2018] LURGS J005302.4+061113 G 00 53 02.41 +06 11 12.9           ~ 1 0
51 [LIB2018] LURGS J005310.4+061510 G 00 53 10.40 +06 15 09.5           ~ 1 0
52 [LIB2018] LURGS J011901.8-294342 G 01 19 01.83 -29 43 42.0           ~ 1 0
53 [LIB2018] LURGS J011909.6-294241 G 01 19 09.59 -29 42 40.6           ~ 1 0
54 [LIB2018] LURGS J011915.9-294748 G 01 19 15.86 -29 47 47.6           ~ 1 0
55 [LIB2018] LURGS J011918.9-294516 G 01 19 18.93 -29 45 15.7           ~ 1 0
56 H-ATLAS J013155.8-311145 G 01 31 55.77 -31 11 45.5           ~ 2 0
57 [LIB2018] LURGS J013204.5-311239 G 01 32 04.46 -31 12 38.5           ~ 1 0
58 [LIB2018] LURGS J013215.5-310837 G 01 32 15.51 -31 08 36.6           ~ 1 0
59 [LIB2018] LURGS J014201.6-323624 G 01 42 01.58 -32 36 23.8           ~ 1 0
60 [LIB2018] LURGS J014208.2-323426 G 01 42 08.20 -32 34 26.3           ~ 1 0
61 [LIB2018] LURGS J014214.4-322900 G 01 42 14.41 -32 29 00.2           ~ 1 0
62 [LIB2018] LURGS J014218.2-323502 G 01 42 18.19 -32 35 01.5           ~ 1 0
63 [LIB2018] LURGS J014226.2-323324 G 01 42 26.25 -32 33 23.8           ~ 1 0
64 [LIB2018] LURGS J014448.8-283535 G 01 44 48.78 -28 35 35.4           ~ 1 0
65 [LIB2018] LURGS J014456.9-284146 G 01 44 56.88 -28 41 46.0           ~ 1 0
66 [LIB2018] LURGS J014506.7-284457 G 01 45 06.66 -28 44 57.3           ~ 1 0
67 [LIB2018] LURGS J021737.3-031208 G 02 17 37.29 -03 12 08.0           ~ 1 0
68 [LIB2018] LURGS J021745.3-030912 G 02 17 45.30 -03 09 12.3           ~ 1 0
69 [LIB2018] LURGS J021757.1-030753 G 02 17 57.12 -03 07 53.0           ~ 1 0
70 NAME SXDSF reg 02 18 00 -05 00.0           ~ 237 1
71 [LIB2018] LURGS J022630.2-032530 G 02 26 30.16 -03 25 30.0           ~ 1 0
72 [LIB2018] LURGS J022644.9-032510 G 02 26 44.90 -03 25 10.1           ~ 1 0
73 [LIB2018] LURGS J022650.0-032542 G 02 26 50.00 -03 25 41.9           ~ 1 0
74 [LIB2018] LURGS J022656.6-032711 G 02 26 56.60 -03 27 11.1           ~ 1 0
75 [LIB2018] LURGS J022700.8-032541 G 02 27 00.81 -03 25 41.0           ~ 1 0
76 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
77 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 862 0
78 [LIB2018] LURGS J033655.2-292627 G 03 36 55.23 -29 26 26.9           ~ 1 0
79 [LIB2018] LURGS J033700.3-291746 G 03 37 00.35 -29 17 45.8           ~ 1 0
80 [LIB2018] LURGS J033700.7-292148 G 03 37 00.72 -29 21 48.0           ~ 1 0
81 [LIB2018] LURGS J043649.4-544008 G 04 36 49.44 -54 40 08.4           ~ 1 0
82 2HERMES S250 J043657.7-543810 G 04 36 57.7 -54 38 10           ~ 21 0
83 [LIB2018] LURGS J043704.7-543914 G 04 37 04.65 -54 39 13.7           ~ 1 0
84 [LIB2018] LURGS J043707.5-543401 G 04 37 07.51 -54 34 00.6           ~ 1 0
85 [LIB2018] LURGS J043717.4-543506 G 04 37 17.35 -54 35 06.2           ~ 1 0
86 [LIB2018] LURGS J043717.5-543528 G 04 37 17.49 -54 35 28.3           ~ 1 0
87 [LIB2018] LURGS J043729.9-543605 G 04 37 29.90 -54 36 04.5           ~ 1 0
88 [LIB2018] LURGS J044410.1-534949 G 04 44 10.13 -53 49 49.1           ~ 1 0
89 [LIB2018] LURGS J044500.4-534906 G 04 45 00.43 -53 49 06.2           ~ 1 0
90 [LIB2018] LURGS J090019.4+004016 G 09 00 19.37 +00 40 15.7           ~ 1 0
91 H-ATLAS J090032.8+004316 LeG 09 00 32.7 +00 43 16           ~ 3 0
92 [LIB2018] LURGS J090037.1+003624 G 09 00 37.14 +00 36 24.3           ~ 1 0
93 H-ATLAS J090045.4+004125 G 09 00 45.4 +00 41 25           ~ 26 0
94 [LIB2018] LURGS J090054.2+004343 G 09 00 54.21 +00 43 43.1           ~ 1 0
95 [LIB2018] LURGS J090057.1+004039 G 09 00 57.08 +00 40 39.4           ~ 1 0
96 [LIB2018] LURGS J090057.3+004105 G 09 00 57.28 +00 41 04.8           ~ 1 0
97 NAME Lockman Hole East Field reg 10 52 08.82 +57 21 33.8           ~ 39 0
98 PKS J1140-2628 rG 11 40 48.35884 -26 29 08.6316     22.00     ~ 325 1
99 [LIB2018] LURGS J145006.3+015038 G 14 50 06.29 +01 50 38.4           ~ 1 0
100 [LIB2018] LURGS J145012.1+015158 G 14 50 12.06 +01 51 57.5           ~ 1 0
101 H-ATLAS J145012.7+014813 G 14 50 12.7 +01 48 13           ~ 3 0
102 [LIB2018] LURGS J145015.4+015237 G 14 50 15.43 +01 52 37.1           ~ 1 0
103 [LIB2018] LURGS J145023.8+015104 G 14 50 23.82 +01 51 04.4           ~ 1 0
104 [LIB2018] LURGS J145025.7+015115 G 14 50 25.66 +01 51 14.8           ~ 1 0
105 NAME HFLS 3 G 17 06 47.8 +58 46 23           ~ 151 0
106 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0
107 ClG J2143-4423 ClG 21 43 -44.4           ~ 18 0
108 [LIB2018] LURGS J222725.2-333920 G 22 27 25.22 -33 39 19.5           ~ 1 0
109 [LIB2018] LURGS J222727.8-334056 G 22 27 27.79 -33 40 56.3           ~ 1 0
110 [LIB2018] LURGS J222730.4-333534 G 22 27 30.44 -33 35 33.6           ~ 1 0
111 [LIB2018] LURGS J222731.1-334004 G 22 27 31.09 -33 40 03.7           ~ 1 0
112 [LIB2018] LURGS J222733.7-333440 G 22 27 33.67 -33 34 40.2           ~ 1 0
113 H-ATLAS J222737.1-333835 G 22 27 37.1 -33 38 35           ~ 3 0
114 [LIB2018] LURGS J222737.7-333727 G 22 27 37.70 -33 37 26.8           ~ 1 0
115 [LIB2018] LURGS J222744.7-333741 G 22 27 44.74 -33 37 40.8           ~ 1 0
116 [LIB2018] LURGS J222747.9-333533 G 22 27 47.89 -33 35 32.7           ~ 1 0
117 [LIB2018] LURGS J222750.1-334153 G 22 27 50.14 -33 41 53.2           ~ 1 0
118 [LIB2018] LURGS J222753.8-333529 G 22 27 53.81 -33 35 28.5           ~ 1 0
119 QSO B2255-2814 Bla 22 58 05.96287687 -27 58 21.2567572   17.34 16.77 17.20   ~ 397 1

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