2017ApJ...849L..36I

Query : 2017ApJ...849L..36I

2017ApJ...849L..36I - Astrophys. J., 849, L36-L36 (2017/November-2)

Very compact millimeter sizes for composite star-forming/AGN submillimeter galaxies.

IKARASHI S., CAPUTI K.I., OHTA K., IVISON R.J., LAGOS C.D.P., BISIGELLO L., HATSUKADE B., ARETXAGA I., DUNLOP J.S., HUGHES D.H., IONO D., IZUMI T., KASHIKAWA N., KOYAMA Y., KAWABE R., KOHNO K., MOTOHARA K., NAKANISHI K., TAMURA Y., UMEHATA H., WILSON G.W., YABE K. and YUN M.S.

Abstract (from CDS):

We report the study of the far-infrared (IR) sizes of submillimeter galaxies (SMGs) in relation to their dust-obscured star formation rate (SFR) and active galactic nuclei (AGN) presence, determined using mid-IR photometry. We determined the millimeter-wave (λobs=1100 µm) sizes of 69 Atacama Large Millimeter/submillimeter Array (ALMA)-identified SMGs, selected with 10σ confidence on ALMA images (F_1100µm_=1.7-7.4 mJy). We found that all of the SMGs are located above an avoidance region in the size-flux plane, as expected by the Eddington limit for star formation. In order to understand what drives the different millimeter-wave sizes in SMGs, we investigated the relation between millimeter-wave size and AGN fraction for 25 of our SMGs at z = 1-3. We found that the SMGs for which the mid-IR emission is dominated by star formation or AGN have extended millimeter-sizes, with respective median Rc,e=1.6–0.21+0.34 and 1.5–0.24+0.93 kpc. Instead, the SMGs for which the mid-IR emission corresponds to star-forming/AGN composites have more compact millimeter-wave sizes, with median Rc,e=1.0–0.20+0.20 kpc. The relation between millimeter-wave size and AGN fraction suggests that this size may be related to the evolutionary stage of the SMG. The very compact sizes for composite star-forming/AGN systems could be explained by supermassive black holes growing rapidly during the SMG coalescing, star-formation phase.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: high-redshift - submillimeter: galaxies - submillimeter: galaxies

VizieR on-line data: <Available at CDS (J/ApJ/849/L36): table1.dat>

Nomenclature: Table 1: ASXDF 1100.NNN.NA N=69 among (Nos 002.1-252.1).

Simbad objects: 72

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Number of rows : 72
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 IC 1623 IG 01 07 47.24 -17 30 25.0   15       ~ 338 2
2 AS2UDS 0167.0 G 02 16 33.85 -05 02 42.7   26.37518 22.6214 25.06331   ~ 3 0
3 AS2UDS 0034.0 G 02 16 38.33 -05 01 21.5           ~ 4 0
4 AS2UDS 0087.0 G 02 16 41.04 -05 01 12.5     24.0356     ~ 3 0
5 AS2UDS 0024.0 G 02 16 41.11 -05 03 51.4           ~ 6 0
6 AS2UDS 0201.0 G 02 16 41.94 -05 07 04.3   27.75404 23.7919 27.18736   ~ 3 0
7 AS2UDS 0074.0 G 02 16 44.48 -05 02 21.6   23.87139 23.71800 23.39314   ~ 3 0
8 AS2UDS 0004.0 G 02 16 47.93 -05 01 29.9     22.2537 26.76636   ~ 7 0
9 AS2UDS 0186.0 G 02 16 48.20 -04 58 59.6           ~ 8 0
10 AS2UDS 0539.0 G 02 16 50.4336 -05 10 15.758     23.9565     ~ 4 0
11 AS2UDS J021659.42-051055.88 AG? 02 16 59.4434 -05 10 55.338   23.436 22.986 22.440   ~ 9 0
12 AS2UDS 0346.0 G 02 17 05.65 -05 15 04.9           ~ 5 0
13 ASXDF 1100.095.1 AG? 02 17 12.9712 -05 14 12.067   27.731 26.898 26.948   ~ 6 0
14 AS2UDS J021713.33-045857.51 rG 02 17 13.34 -04 58 57.4           ~ 4 0
15 AS2UDS 0128.0 G 02 17 15.41 -04 57 55.6     23.9445     ~ 3 0
16 AS2UDS 0116.0 G 02 17 20.02 -05 13 05.7   26.02975 21.5447 25.57254   ~ 12 0
17 AS2UDS 0084.0 G 02 17 20.80 -04 49 49.5   27.82382 22.9898 26.93976   ~ 3 0
18 AS2UDS 0069.0 G 02 17 21.53 -05 19 07.8   27.11858 22.4896 26.73968   ~ 6 0
19 AS2UDS 0036.0 G 02 17 27.3010 -05 06 42.750     24.3536     ~ 6 0
20 AS2UDS J021729.76-050318.63 rG 02 17 29.77 -05 03 18.6   26.27905 21.7619 25.61189   ~ 4 0
21 AS2UDS 0007.0 G 02 17 30.44 -05 19 22.4           ~ 7 0
22 AS2UDS J021730.63-045936.75 rG 02 17 30.63 -04 59 36.8   27.94356 22.611 26.04630   ~ 13 0
23 AS2UDS 0173.0 QSO 02 17 32.417 -05 12 51.09   22.45345 21.48767 21.61290   ~ 10 0
24 AS2UDS 0236.0 G 02 17 32.59 -04 50 26.4           ~ 4 0
25 ASXDF 1100.052.1 G 02 17 33.17 -05 01 54.5           ~ 1 0
26 AS2UDS 0136.0 G 02 17 35.37 -05 28 37.3     24.8222     ~ 3 0
27 AS2UDS J021736.00-052034.45 rG 02 17 36.00 -05 20 34.4   24.39211 21.3416 23.39872   ~ 5 0
28 AS2UDS 0099.0 G 02 17 37.24 -04 47 53.0   27.89188 22.9821 26.55641   ~ 4 0
29 AS2UDS 0031.0 G 02 17 39.79 -05 29 19.2     23.5753 27.11823   ~ 4 0
30 AS2UDS 0028.0 G 02 17 42.11 -04 56 27.6           ~ 3 0
31 ASXDF 1100.009.1B G 02 17 42.16 -04 56 28.5           ~ 1 0
32 AS2UDS 0120.0 G 02 17 42.17 -05 25 46.8     25.0264     ~ 3 0
33 AS2UDS 0519.0 G 02 17 42.55 -05 29 00.3     24.2627     ~ 3 0
34 AS2UDS J021744.26-052008.59 EmG 02 17 44.27 -05 20 08.6     22.7521 26.05094   ~ 13 0
35 AS2UDS J021745.84-050056.81 rG 02 17 45.85 -05 00 56.7           ~ 7 0
36 AS2UDS 0171.0 G 02 17 46.16 -04 47 47.2     22.5759 27.36283   ~ 3 0
37 AS2UDS 0042.0 G 02 17 50.59 -05 30 59.2           ~ 4 0
38 AS2UDS 0465.0 G 02 17 53.25 -04 49 51.5   26.96676 22.793 26.08070   ~ 3 0
39 AS2UDS 0414.0 G 02 17 53.87 -05 26 35.7     24.7618     ~ 3 0
40 AS2UDS 0044.0 G 02 17 54.80 -05 23 23.0   27.54170 22.9207 26.76316   ~ 7 0
41 AS2UDS 0424.0 G 02 17 55.24 -05 06 45.1     24.6027     ~ 4 0
42 AS2UDS J021756.74-045238.94 rG 02 17 56.74 -04 52 38.9   26.37572 21.2056 25.70373   ~ 7 0
43 AS2UDS 0106.0 G 02 17 59.32 -05 05 04.6   25.86702 22.3941 24.15620   ~ 12 0
44 AS2UDS 0206.0 G 02 17 59.65 -04 46 49.7           ~ 6 0
45 NAME SXDSF reg 02 18 00 -05 00.0           ~ 237 1
46 AS2UDS J021802.87-050031.02 rG 02 18 02.86 -05 00 31.6   25.69890 20.6746 24.48834   ~ 5 0
47 AS2UDS 0008.0 G 02 18 03.01 -05 28 41.9     23.9648 26.79586   ~ 7 0
48 AS2UDS 0012.0 G 02 18 03.56 -04 55 27.3   26.11986 22.0709 25.31086   ~ 17 0
49 AS2UDS 0513.0 G 02 18 04.37 -05 34 03.5           ~ 3 0
50 AS2UDS 0684.0 G 02 18 05.51 -05 35 46.5           ~ 3 0
51 AS2UDS 0006.0 G 02 18 05.65 -05 10 49.7     24.3077 26.78275   ~ 9 0
52 AS2UDS 0169.0 G 02 18 07.85 -05 25 49.3     23.8668     ~ 3 0
53 AS2UDS J021809.67-051843.22 rG 02 18 09.66 -05 18 43.1   25.01470 21.6298 24.51270   ~ 5 0
54 AS2UDS 0146.0 G 02 18 10.64 -05 34 53.6           ~ 3 0
55 AS2UDS 0121.1 G 02 18 11.00 -04 49 51.9     24.302 26.30396   ~ 4 0
56 AS2UDS 0609.0 G 02 18 13.76 -05 37 27.3           ~ 3 0
57 AS2UDS 0079.0 G 02 18 13.83 -04 57 43.5           ~ 9 0
58 AS2UDS 0067.0 G 02 18 16.49 -04 55 08.8   25.91939 21.3725 24.73525   ~ 5 0
59 ASXDF 1100.097.2 G 02 18 17.61 -05 34 27.9           ~ 1 0
60 AS2UDS 0560.0 G 02 18 18.54 -05 34 34.7           ~ 3 0
61 AS2UDS J021818.84-045029.12 rG 02 18 18.84 -04 50 29.9   26.75304 22.6548 25.99932   ~ 4 0
62 AS2UDS 0033.0 G 02 18 20.40 -05 31 43.2           ~ 6 0
63 AS2UDS 0149.0 G 02 18 22.30 -05 07 37.0     23.1412 26.40669   ~ 3 0
64 ASXDF 1100.203.1 G 02 18 23.15 -05 27 02.0           ~ 1 0
65 AS2UDS 0022.0 G 02 18 23.73 -05 11 38.5           ~ 6 0
66 AS2UDS 0439.0 G 02 18 23.96 -05 32 07.8           ~ 3 0
67 AS2UDS 0438.0 G 02 18 24.59 -05 31 48.5     24.8295 27.46519   ~ 3 0
68 AS2UDS 0218.0 G 02 18 33.31 -04 58 07.0     24.4181     ~ 4 0
69 AS2UDS 0100.0 G 02 18 38.29 -05 03 18.3   27.90417 22.8203 26.24380   ~ 3 0
70 AS2UDS J021842.69-045931.96 rG 02 18 42.68 -04 59 32.1   25.78187 20.6982 24.85993   ~ 5 0
71 ASXDF 1100.213.1 G 02 18 44.02 -05 35 31.3           ~ 1 0
72 AS2UDS 0242.0 G 02 18 46.15 -05 04 12.5     24.0976     ~ 3 0

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