2018ApJ...856...72O

Query : 2018ApJ...856...72O

2018ApJ...856...72O - Astrophys. J., 856, 72-72 (2018/March-3)

An extreme protocluster of luminous dusty starbursts in the early universe.

OTEO I., IVISON R.J., DUNNE L., MANILLA-ROBLES A., MADDOX S., LEWIS A.J.R., DE ZOTTI G., BREMER M., CLEMENTS D.L., COORAY A., DANNERBAUER H., EALES S., GREENSLADE J., OMONT A., PEREZ-FOURNON I., RIECHERS D., SCOTT D., VAN DER WERF P., WEISS A. and ZHANG Z.-Y.

Abstract (from CDS):

We report the identification of an extreme protocluster of galaxies in the early universe whose core (nicknamed Distant Red Core, DRC, because of its very red color in Herschel SPIRE bands) is formed by at least 10 dusty star-forming galaxies (DSFGs), spectroscopically confirmed to lie at zspec=4.002 via detection of [C I](1-0), 12CO(6-5), 12CO(4-3), 12CO(2-1), and H2O(211–202) emission lines with ALMA and ATCA. These DSFGs are distributed over a 260kpc×310kpc region and have a collective obscured star formation rate (SFR) of ∼6500M☉yr–1, considerably higher than those seen before in any protocluster at z≳4. Most of the star formation is taking place in luminous DSFGs since no Lyα emitters are detected in the protocluster core, apart from a Lyα blob located next to one of the DRC components, extending over 60kpc. The total obscured SFR of the protocluster could rise to SFR∼14,400M☉yr–1 if all the members of an overdensity of bright DSFGs discovered around DRC in a wide-field Large APEX BOlometer CAmera 870 µm image are part of the same structure. [C I](1-0) emission reveals that DRC has a total molecular gas mass of at least MH2_∼6.6×1011M☉, and its total halo mass could be as high as ∼4.4×1013M☉, indicating that it is the likely progenitor of a cluster at least as massive as Coma at z = 0.

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

Journal keyword(s): galaxies: clusters: general - galaxies: evolution - galaxies: high-redshift - radio lines: ISM - submillimeter: galaxies - submillimeter: ISM

Nomenclature: [OID2018] DRC cluster N=1. Figs 1-5, Table 1: [OID2018] DRC-NN (Nos 1-11). Fig. 1: [OID2018] DRC-A (Nos A-H).

CDS comments: G15.141 is H-ATLAS J142413.9+022304 in SIMBAD.

Simbad objects: 18

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Number of rows : 18
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 [OID2018] DRC-7 G 00 42 22.12 -33 43 58.2           ~ 4 0
2 [OID2018] DRC-3 G 00 42 23.31 -33 43 59.9           ~ 6 0
3 [OID2018] DRC-8 G 00 42 23.46 -33 43 32.5           ~ 5 0
4 [OID2018] DRC-1 G 00 42 23.52 -33 43 23.4           ~ 6 0
5 [OID2018] DRC-10 G 00 42 23.53 -33 43 43.9           ~ 4 0
6 [OID2018] DRC-9 G 00 42 23.56 -33 43 47.3           ~ 4 0
7 H-ATLAS J004223.5-334340 G 00 42 23.56 -33 43 38.5           ~ 9 0
8 [OID2018] DRC cluster PCG 00 42 23.6 -33 43 38           ~ 28 0
9 [OID2018] DRC-5 G 00 42 23.65 -33 43 55.7           ~ 4 0
10 [OID2018] DRC-11 G 00 42 23.87 -33 44 02.9           ~ 4 0
11 [OID2018] DRC-4 G 00 42 23.95 -33 43 35.4           ~ 5 0
12 [OID2018] DRC-6 G 00 42 24.64 -33 43 26.4           ~ 4 0
13 PMN J0054-2351 rG 00 54 29.83 -23 51 32.3           ~ 24 1
14 NAME COSMOS AZtec 3 Cluster ClG 10 00 20.7 +02 35 20           ~ 17 0
15 NAME G15.v2.779 LeG 14 24 13.9 +02 23 04           ~ 59 0
16 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
17 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0
18 NAME SSA22 Protocluster PCG 22 17 34.0 +00 17 01           ~ 175 0

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