2017A&A...606A..17M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:49:19

2017A&A...606A..17M - Astronomy and Astrophysics, volume 606A, 17-17 (2017/10-1)

An ALMA survey of submillimetre galaxies in the COSMOS field: Physical properties derived from energy balance spectral energy distribution modelling.

MIETTINEN O., DELVECCHIO I., SMOLCIC V., ARAVENA M., BRISBIN D., KARIM A., MAGNELLI B., NOVAK M., SCHINNERER E., ALBRECHT M., AUSSEL H., BERTOLDI F., CAPAK P.L., CASEY C.M., HAYWARD C.C., ILBERT O., INTEMA H.T., JIANG C., LE FEVRE O., McCRACKEN H.J., MUNOZ ARANCIBIA A.M., NAVARRETE F., PADILLA N.D., RIECHERS D.A., SALVATO M., SCOTT K.S., SHETH K. and TASCA L.A.M.

Abstract (from CDS):

Context. Submillimetre galaxies (SMGs) represent an important source population in the origin and cosmic evolution of the most massive galaxies. Hence, it is imperative to place firm constraints on the fundamental physical properties of large samples of SMGs.
Aims. We determine the physical properties of a sample of SMGs in the COSMOS field that were pre-selected at the observed-frame wavelength of λobs=1.1mm, and followed up at λobs=1.3mm with the Atacama Large Millimetre/submillimetre Array (ALMA).
Methods. We used the MAGPHYS model package to fit the panchromatic (ultraviolet to radio) spectral energy distributions (SEDs) of 124 of the target SMGs, which lie at a median redshift of z=2.30 (19.4% are spectroscopically confirmed). The SED analysis was complemented by estimating the gas masses of the SMGs by using the λobs=1.3mm dust emission as a tracer of the molecular gas component.
Results. The sample median and 16th-84th percentile ranges of the stellar masses, obscured star formation rates, dust temperatures, and dust and gas masses were derived to be log(M*/M)=11.09+0.41–0.53, SFR=402+661–233M/yr, Tdust=39.7+9.7–7.4K, log(Mdust/M)=9.01+0.20–0.31, and log(Mgas/M=11.34+0.20–0.23, respectively. The Mdust/M* ratio was found to decrease as a function of redshift, while the Mgas/Mdust ratio shows the opposite, positive correlation with redshift. The derived median gas-to-dust ratio of 120+73–30 agrees well with the canonical expectation. The gas fraction (Mgas/(Mgas+M*)) was found to range from 0.10 to 0.98 with a median of 0.62+0.27–0.23. We found that 57.3% of our SMGs populate the main sequence (MS) of star-forming galaxies, while 41.9% of the sources lie above the MS by a factor of greater than three (one source lies below the MS). These super-MS objects, or starbursts, are preferentially found at z≥3, which likely reflects the sensitivity limit of our source selection. We estimated that the median gas consumption timescale for our SMGs is ∼535Myr, and the super-MS sources appear to consume their gas reservoir faster than their MS counterparts. We found no obvious stellar mass-size correlations for our SMGs, where the sizes were measured in the observed-frame 3GHz radio emission and rest-frame UV. However, the largest 3 GHz radio sizes are found among the MS sources. Those SMGs that appear irregular in the rest-frame UV are predominantly starbursts, while the MS SMGs are mostly disk-like.
Conclusions. The physical parameter distributions of our SMGs and those of the equally bright, 870µm selected SMGs in the ECDFS field (the so-called ALESS SMGs) are unlikely to be drawn from common parent distributions. This might reflect the difference in the pre-selection wavelength. Albeit being partly a selection bias, the abrupt jump in specific SFR and the offset from the MS of our SMGs at z≥3 might also reflect a more efficient accretion from the cosmic gas streams, higher incidence of gas-rich major mergers, or higher star formation efficiency at z≥3. We found a rather flat average trend between the SFR and dust mass, but a positive SFR-Mgas correlation. However, to address the questions of which star formation law(s) our SMGs follow, and how they compare with the Kennicutt-Schmidt law, the dust-emitting sizes of our sources need to be measured. Nonetheless, the larger radio-emitting sizes of the MS SMGs compared to starbursts is a likely indication of their more widespread, less intense star formation activity. The irregular rest-frame UV morphologies of the starburst SMGs are likely to echo their merger nature. The current stellar mass content of the studied SMGs is very high, so they must quench to form the so-called red-and-dead massive ellipticals. Our results suggest that the transition from high-z SMGs to local ellipticals via compact, quiescent galaxies (cQGs) at z∼2 might not be universal, and the latter population might also descend from the so-called blue nuggets. However, z≥4 SMGs could be the progenitors of higher redshift, z≥3 cQGs, while our results are also consistent with the possibility that ultra-massive early-type galaxies found at 1.2≤z≤2 experienced an SMG phase at z≤3.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: starburst - galaxies: star formation - submillimeter: galaxies - submillimeter: galaxies

Simbad objects: 92

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Number of rows : 92

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ClG J0218-0510 ClG 02 18 21.3 -05 10 27           ~ 62 0
2 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 614 0
3 [AWA2011] AzTEC/C13 mm 09 58 37.91 +02 14 08.3           ~ 3 0
4 [AWA2011] AzTEC/C36 mm 09 58 40.29 +02 05 14.7   24.7 23.7     ~ 5 0
5 [AWA2011] AzTEC/C105 mm 09 58 45.11 +02 14 42.1   25.7 24.9     ~ 4 0
6 [AWA2011] AzTEC/C16 mm 09 58 54.11 +02 16 50.5           ~ 3 0
7 [AWA2011] AzTEC/C78 mm 09 59 02.73 +01 59 42.0           ~ 3 0
8 [AWA2011] AzTEC/C56 mm 09 59 05.05 +02 21 56.4   27.7 25.5     ~ 5 0
9 [AWA2011] AzTEC/C113 mm 09 59 14.96 +02 29 57.7   23.7 23.2     ~ 5 0
10 [AWA2011] AzTEC/C119 mm 09 59 15.34 +02 07 48.3           ~ 4 0
11 [AWA2011] AzTEC/C29 mm 09 59 18.38 +02 01 05.9   26.4 25.9     ~ 4 0
12 [AWA2011] AzTEC/C21 mm 09 59 21.55 +02 22 33.5           ~ 5 0
13 [AWA2011] AzTEC/C117 mm 09 59 25.93 +02 20 18.3   27.6 26.8     ~ 3 0
14 [AWA2011] AzTEC/C111 mm 09 59 29.62 +02 12 41.6           ~ 5 0
15 AzTEC 4 smm 09 59 31.700 +02 30 43.96           ~ 17 0
16 [AWA2011] AzTEC/C50 mm 09 59 33.13 +02 08 33.2           ~ 4 0
17 [AWA2011] AzTEC/C27 mm 09 59 37.16 +02 06 56.5   26.8 26.2     ~ 5 0
18 [AWA2011] AzTEC/C88 mm 09 59 37.37 +02 04 23.9           ~ 4 0
19 [AWA2011] AzTEC/C107 mm 09 59 39.56 +02 22 38.3           ~ 4 0
20 [AWA2011] AzTEC/C47 mm 09 59 41.18 +02 01 05.6   24.7 23.8     ~ 5 0
21 [AWA2011] AzTEC/C84 mm 09 59 42.76 +01 55 11.7           ~ 3 0
22 [MNS2015] J095942.86+022938.20 smm 09 59 42.860 +02 29 38.20           ~ 48 0
23 AzTEC J095943.22+022136.1 G 09 59 43.22 +02 21 36.1   24.7 24.1     ~ 8 0
24 [AWA2011] AzTEC/C79 mm 09 59 43.70 +02 13 48.3   27.4 27.0     ~ 4 0
25 AzTEC J095946.66+023541.9 smm 09 59 46.66 +02 35 41.9   26.6 26.1     ~ 4 0
26 [AWA2011] AzTEC/C19 mm 09 59 50.02 +01 53 24.0   23.8 22.9     ~ 5 0
27 AzTEC J095957.35+022732.1 smm 09 59 57.290 +02 27 30.54   27.5 26.8     ~ 14 0
28 AzTEC J095959.34+023441.0 smm 09 59 59.33 +02 34 45.8           ~ 19 0
29 COSMOSMAMBO MM J100000+020634 mm 09 59 59.96 +02 06 33.1           ~ 10 0
30 [AWA2011] AzTEC/C81 mm 10 00 06.11 +01 52 39.2           ~ 5 0
31 [CCC2013] SMM J100006.8+023307 smm 10 00 06.55 +02 32 59.3   24.1 22.8     ~ 6 0
32 [AWA2011] AzTEC/C99 mm 10 00 06.98 +01 59 58.9           ~ 4 0
33 [AWA2011] AzTEC/C35 smm 10 00 08.37 +02 20 24.3   27.3 26.4     ~ 5 0
34 AzTEC 11 PaG 10 00 08.91 +02 40 10.2           ~ 16 0
35 [AWA2011] AzTEC/C112 mm 10 00 10.94 +01 53 09.3   25.3 24.4     ~ 5 0
36 COSMOSMAMBO MM J100012+020125 mm 10 00 12.6 +02 01 25           ~ 6 0
37 AzTEC J100013.21+023428.2 smm 10 00 12.950 +02 34 34.92           ~ 14 0
38 [AWA2011] AzTEC/C76 mm 10 00 13.21 +02 12 07.0     26.2     ~ 4 0
39 [AWA2011] AzTEC/C8 mm 10 00 14.21 +01 56 36.1           ~ 4 0
40 [AWA2011] AzTEC/C115 mm 10 00 14.84 +02 05 32.5           ~ 4 0
41 AzTEC J100015.77+021545.1 smm 10 00 15.7 +02 15 49           ~ 13 0
42 [AWA2011] AzTEC/C95 mm 10 00 18.36 +02 12 42.9   24.4 23.7     ~ 4 0
43 COSMOSVLADP J100019.75+023204.3 rG 10 00 19.74 +02 32 04.3     25.3     ~ 26 0
44 [AWA2011] AzTEC/C58 mm 10 00 20.47 +01 45 00.6   27.1 26.4     ~ 4 0
45 [AWA2011] AzTEC/C123 mm 10 00 22.62 +01 51 45.4   27.3 26.2     ~ 4 0
46 ZFOURGE COSMOS 17661 G 10 00 23.65 +02 21 55.3 23.52 22.48 21.87     ~ 13 0
47 [AWA2011] AzTEC/C70 mm 10 00 26.04 +02 03 14.9   27.7 26.3     ~ 4 0
48 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2069 0
49 [AWA2011] AzTEC/C59 mm 10 00 30.40 +02 37 12.2   24.2 23.4     ~ 5 0
50 [CCC2013] SMM J100033.3+022559 G 10 00 33.36182 +02 26 01.4980           ~ 9 0
51 AzTEC 12 smm 10 00 35.300 +02 43 53.27   26.3 25.4     ~ 15 0
52 [AWA2011] AzTEC/C98 mm 10 00 42.99 +02 05 18.4   27.9       ~ 5 0
53 [AWA2011] AzTEC/C17 mm 10 00 55.34 +02 34 41.1           ~ 9 0
54 COSMOSMAMBO MM J100057+022013 mm 10 00 57.2 +02 20 13           ~ 27 0
55 [AWA2011] AzTEC/C62 mm 10 01 00.37 +02 37 56.3           ~ 4 0
56 [AWA2011] AzTEC/C73 mm 10 01 03.62 +02 28 56.8           ~ 3 0
57 [CCC2013] 850.146 smm 10 01 05.00 +02 26 32.7           ~ 6 0
58 [AWA2011] AzTEC/C86 mm 10 01 09.03 +02 17 26.0   25.6 24.2     ~ 4 0
59 COSMOSMAMBO MM J100109+020346 mm 10 01 09.8 +02 03 46     27.2     ~ 7 0
60 [AWA2011] AzTEC/C109 mm 10 01 11.63 +02 28 38.3   26.6 25.7     ~ 5 0
61 [AWA2011] AzTEC/C20 mm 10 01 14.46 +02 27 02.5   25.9 25.0     ~ 5 0
62 [AWA2011] AzTEC/C46 mm 10 01 14.61 +02 35 11.9   26.9 26.1     ~ 5 0
63 [AWA2011] AzTEC/C108 mm 10 01 16.15 +02 36 06.9           ~ 4 0
64 [AWA2011] AzTEC/C67 mm 10 01 18.61 +02 09 41.7   25.1 23.7     ~ 5 0
65 [AWA2011] AzTEC/C61 mm 10 01 19.68 +02 34 42.0     27.2     ~ 4 0
66 [AWA2011] AzTEC/C37 mm 10 01 21.82 +02 31 21.3           ~ 4 0
67 [AWA2011] AzTEC/C25 mm 10 01 22.02 +01 56 54.3   26.0 25.2     ~ 6 0
68 [AWA2011] AzTEC/C53 mm 10 01 22.65 +02 12 11.8   27.8 26.9     ~ 4 0
69 [AWA2011] AzTEC/C9 mm 10 01 23.24 +02 20 02.7           ~ 3 0
70 [AWA2011] AzTEC/C103 mm 10 01 24.43 +01 56 15.1   27.3       ~ 4 0
71 [AWA2011] AzTEC/C140 mm 10 01 24.98 +01 51 44.4           ~ 2 0
72 [AWA2011] AzTEC/C127 mm 10 01 25.46 +02 35 24.3   25.1 24.4     ~ 5 0
73 [AWA2011] AzTEC/C54 mm 10 01 25.89 +01 57 44.6   26.7 25.4     ~ 4 0
74 [AWA2011] AzTEC/C39 mm 10 01 26.84 +02 00 03.3           ~ 4 0
75 [AWA2011] AzTEC/C91 mm 10 01 28.61 +02 23 47.4           ~ 4 0
76 [AWA2011] AzTEC/C129 mm 10 01 30.23 +02 02 17.6           ~ 5 0
77 [AWA2011] AzTEC/C15 mm 10 01 31.67 +02 25 09.0           ~ 5 0
78 [AWA2011] AzTEC/C49 mm 10 01 31.83 +01 54 03.3           ~ 3 0
79 [AWA2011] AzTEC/C93 mm 10 01 32.02 +02 11 37.0   27.8 26.0     ~ 5 0
80 [AWA2011] AzTEC/C26 mm 10 01 32.27 +02 32 14.4           ~ 5 0
81 [AWA2011] AzTEC/C12 mm 10 01 36.87 +02 11 03.0   26.4 25.3     ~ 5 0
82 [AWA2011] AzTEC/C69 mm 10 01 38.07 +02 09 08.9           ~ 3 0
83 [AWA2011] AzTEC/C64 mm 10 01 39.64 +02 23 45.2           ~ 4 0
84 [AWA2011] AzTEC/C11 mm 10 01 41.02 +02 04 04.8   25.9 25.8     ~ 6 0
85 [AWA2011] AzTEC/C1 mm 10 01 41.70 +02 27 11.7           ~ 8 0
86 [AWA2011] AzTEC/C23 mm 10 01 42.65 +02 18 33.1           ~ 6 0
87 [AWA2011] AzTEC/C41 mm 10 01 48.08 +02 21 29.3   24.2 23.5     ~ 4 0
88 [AWA2011] AzTEC/C52 mm 10 01 56.23 +02 21 06.3   25.1 24.3     ~ 5 0
89 [AWA2011] AzTEC/C126 mm 10 01 59.48 +02 22 39.4           ~ 4 0
90 [AWA2011] AzTEC/C72 mm 10 01 59.82 +02 04 59.8   25.7 24.9     ~ 5 0
91 [AWA2011] AzTEC/C87 mm 10 02 05.50 +02 17 00.1           ~ 4 0
92 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2683 4

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2020.07.14-19:49:19

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