2011A&A...530L...8D


Query : 2011A&A...530L...8D

2011A&A...530L...8D - Astronomy and Astrophysics, volume 530, L8-8 (2011/6-1)

Enhanced [CII] emission in a z=4.76 submillimetre galaxy.

DE BREUCK C., MAIOLINO R., CASELLI P., COPPIN K., HAILEY-DUNSHEATH S. and NAGAO T.

Abstract (from CDS):

We present the detection of bright [CII] emission in the z=4.76 submillimetre galaxy LESS J033229.4-275619 using the Atacama Pathfinder EXperiment. This represents the highest redshift [CII] detection in a submm selected, star-formation dominated system. The AGN contributions to the [CII] and far-infrared (FIR) luminosities are small. We find an atomic mass derived from [CII] comparable to the molecular mass derived from CO. The ratio of the [CII], CO and FIR luminosities imply a radiation field strength G0∼103 and a density ∼104cm–3 in a kpc-scale starburst, as seen in local and high redshift starbursts. The high L[CII]/LFIR=2.4x10–3 and the very high L[CII]/LCO(1–0)≃104 are reminiscent of low metallicity dwarf galaxies, suggesting that the highest redshift star-forming galaxies may also be characterised by lower metallicities. We discuss the implications of a reduced metallicity on studies of the gas reservoirs, and conclude that especially at very high redshift, [CII] may be a more powerful and reliable tracer of the interstellar matter than CO.

Abstract Copyright:

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - submillimeter: galaxies - infrared: galaxies

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 IC 10 G 00 20 25.50 +59 17 17.0   13.6 9.5     ~ 1118 1
2 V* R For C* 02 29 15.3077617632 -26 05 55.646585700   12.94 7.50 8.01   C4,3e 196 0
3 NGC 1156 rG 02 59 42.8528847264 +25 14 28.352017320 12.13 12.32 11.74     ~ 313 1
4 ALESS J033229.29-275619.7 QSO 03 32 29.2912 -27 56 19.465     26.76 25.82 25.1655 ~ 110 0
5 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1240 3
6 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2017 2
7 QSO B0952-0115 QSO 09 55 00.1037541106 -01 30 06.549307797     18.7     ~ 142 0
8 NAME COSMOS AZtec 3 Cluster ClG 10 00 20.7 +02 35 20           ~ 13 0
9 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 452 0
10 QSO B1202-074 QSO 12 05 23.1360370080 -07 42 32.759842896     17.5     ~ 376 5
11 NGC 4142 GiC 12 09 30.1608521208 +53 06 17.156506896   14.3       ~ 74 0
12 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 965 1
13 NAME NGC 4214-I HII 12 15 39.686 +36 19 34.12           ~ 16 0
14 NAME NGC 4214-II HII 12 15 40.7900 +36 19 09.260           ~ 16 0
15 BRI B1335-0417 G 13 38 03.4151935680 -04 32 34.981751112   19.4       ~ 102 0
16 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 227 0

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