2022MNRAS.515.3126I

Query : 2022MNRAS.515.3126I

2022MNRAS.515.3126I - Mon. Not. R. Astron. Soc., 515, 3126-3143 (2022/September-3)

The ALMA REBELS Survey: dust continuum detections at z > 6.5.

INAMI H., ALGERA H.S.B., SCHOUWS S., SOMMOVIGO L., BOUWENS R., SMIT R., STEFANON M., BOWLER R.A.A., ENDSLEY R., FERRARA A., OESCH P., STARK D., ARAVENA M., BARRUFET L., DA CUNHA E., DAYAL P., DE LOOZE I., FUDAMOTO Y., GONZALEZ V., GRAZIANI L., HODGE J.A., HYGATE A.P.S., NANAYAKKARA T., PALLOTTINI A., RIECHERS D.A., SCHNEIDER R., TOPPING M. and VAN DER WERF P.

Abstract (from CDS):

We report 18 dust continuum detections (≥3.3σ) at ∼88 and 158 $\mu{\rm m}$ out of 49 ultraviolet (UV)-bright galaxies (MUV < -21.3 mag) at $z$ > 6.5, observed by the Cycle-7 Atacama Large Millimeter/submillimeter Array (ALMA) Large Program, Reionization-Era Bright Emission Line Survey (REBELS) and its pilot programs. This has more than tripled the number of dust continuum detections known at $z$ > 6.5. Out of these 18 detections, 12 are reported for the first time as part of REBELS. In addition, 15 of the dust continuum detected galaxies also show a [C II]$_{\rm 158\,{\rm \mu m}}$ emission line, providing us with accurate redshifts. We anticipate more line emission detections from six targets (including three continuum detected targets) where observations are still ongoing. We estimate that all of the sources have an infrared (IR) luminosity (LIR) in a range of $3\!-\!8 \times 10^{11}\, {\rm L_\odot }$, except for one with $L_{\rm IR} = 1.5^{+0.8}_{-0.5} \times 10^{12}\, \, {\rm L_{\odot }}$. Their fraction of obscured star formation is significant at ${\gtrsim} 50{{\ \rm per\ cent}}$, despite being UV-selected galaxies. Some of the dust continuum detected galaxies show spatial offsets (∼0.5-1.5 arcsec) between the rest-UV and far-IR emission peaks. These separations could imply spatially decoupled phases of obscured and unobscured star formation, but a higher spatial resolution observation is required to confirm this. REBELS offers the best available statistical constraints on obscured star formation in UV-luminous galaxies at $z$ > 6.5.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): methods: observational - galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: ISM - infrared: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/515/3126): table1.dat>

Nomenclature: Table 1: REBELS-PN (Nos P1-P9).

Simbad objects: 55

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Number of rows : 55
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 [ARK2015] 4886 LeG 00 14 24.927 -30 22 56.15           ~ 85 0
2 REBELS-01 G 02 16 25.092 -04 57 38.50           ~ 6 0
3 REBELS-02 G 02 16 32.43 -05 30 05.6           ~ 5 0
4 CANDELS UDS F160W J021715.24-050745.6 G 02 17 15.2462 -05 07 45.657           ~ 11 0
5 REBELS-04 G 02 17 42.470 -04 58 57.80           ~ 6 0
6 REBELS-05 G 02 18 11.50 -05 00 59.4           ~ 16 0
7 REBELS-06 G 02 18 47.47 -05 10 20.3           ~ 6 0
8 REBELS-07 G 02 18 56.536 -05 19 58.92           ~ 44 0
9 REBELS-08 G 02 19 35.140 -05 23 19.31           ~ 13 0
10 REBELS-09 G 02 21 54.150 -04 24 12.29           ~ 5 0
11 REBELS-10 G 02 22 32.59 -04 56 51.2           ~ 5 0
12 REBELS-11 G 02 24 39.35 -04 48 30.0           ~ 4 0
13 REBELS-12 G 02 25 07.94 -05 06 40.7           ~ 21 0
14 REBELS-13 G 02 26 16.50 -04 07 04.0           ~ 6 0
15 REBELS-14 G 02 26 46.190 -04 59 53.57           ~ 17 0
16 REBELS-15 G 02 27 13.120 -04 17 59.25           ~ 10 0
17 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1623 1
18 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
19 ALMA J041609.4-240535 LeG 04 16 09.401 -24 05 35.47         28.96 ~ 67 0
20 REBELS-16 G 04 29 37.20 -02 53 49.1           ~ 5 0
21 COSMOS2015 516548 G 09 57 37.000 +02 05 11.32           ~ 8 0
22 COSMOS2015 689079 G 09 57 47.90 +02 20 43.7           ~ 21 0
23 REBELS-19 G 09 57 54.690 +02 27 54.90           ~ 13 0
24 COSMOS2015 776817 G 09 58 46.200 +02 28 45.76           ~ 13 0
25 REBELS-P2 G 09 59 02.566 +02 38 06.05           ~ 7 0
26 REBELS-P3 G 09 59 09.621 +02 45 09.68           ~ 7 0
27 COSMOS2015 541149 G 09 59 15.89 +02 07 32.0           ~ 6 0
28 COSMOS2015 969849 G 09 59 19.360 +02 46 41.40           ~ 10 0
29 COSMOS2015 651241 G 09 59 20.35 +02 17 22.7           ~ 4 0
30 HSCS J100004+015835 G 10 00 04.360 +01 58 35.53           ~ 11 0
31 REBELS-P4 G 10 00 12.51 +02 03 00.5           ~ 8 0
32 COSMOS2015 334704 G 10 00 28.13 +01 47 54.4           ~ 8 0
33 REBELS-P6 G 10 00 29.870 +02 13 02.47           ~ 33 0
34 REBELS-P7 G 10 00 29.89 +01 46 46.4           ~ 10 0
35 CANDELS COSMOS F160W J100030.18+021559.7 G 10 00 30.19 +02 15 59.8           ~ 53 0
36 REBELS-24 G 10 00 31.89 +01 57 50.2           ~ 9 0
37 REBELS-25 G 10 00 32.322 +01 44 31.26           ~ 39 0
38 COSMOS2015 481451 G 10 00 42.130 +02 01 56.87           ~ 12 0
39 COSMOS2015 877552 G 10 00 43.38 +02 37 51.8           ~ 19 0
40 REBELS-27 G 10 00 58.485 +01 49 55.96           ~ 18 0
41 COSMOS2015 888219 G 10 01 04.60 +02 38 56.7           ~ 6 0
42 COSMOS2015 876803 G 10 01 36.86 +02 37 49.3           ~ 25 0
43 COSMOS2015 408255 G 10 01 40.70 +01 54 52.5           ~ 71 0
44 COSMOS2015 743699 G 10 01 52.31 +02 25 42.3           ~ 17 0
45 COSMOS2015 824866 G 10 01 58.50 +02 33 08.5           ~ 12 0
46 REBELS-32 G 10 01 59.060 +01 53 27.75           ~ 15 0
47 COSMOS2015 607297 G 10 02 03.82 +02 13 25.1           ~ 7 0
48 COSMOS2015 607293 G 10 02 06.49 +02 13 24.1           ~ 16 0
49 COSMOS2015 839149 G 10 02 06.70 +02 34 21.4           ~ 5 0
50 COSMOS2020 Classic 1151531 G 10 02 12.558 +02 30 45.71           ~ 15 0
51 REBELS-37 G 10 02 31.810 +02 31 17.10           ~ 8 0
52 COSMOS2015 923550 G 10 02 54.040 +02 42 11.94           ~ 18 0
53 HSCS J100305+021842 G 10 03 05.250 +02 18 42.75           ~ 21 0
54 ALMA J131129.9-011918 G 13 11 29.93 -01 19 18.7           ~ 91 0
55 REBELS-40 G 23 50 34.660 -43 32 32.50           ~ 12 0

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