2002MNRAS.331..817S

Query : 2002MNRAS.331..817S

2002MNRAS.331..817S - Mon. Not. R. Astron. Soc., 331, 817-838 (2002/April-3)

The SCUBA 8-mJy survey - I. Submillimetre maps, sources and number counts.

SCOTT S.E., FOX M.J., DUNLOP J.S., SERJEANT S., PEACOCK J.A., IVISON R.J., OLIVER S., MANN R.G., LAWRENCE A., EFSTATHIOU A., ROWAN-ROBINSON M., HUGHES D.H., ARCHIBALD E.N., BLAIN A. and LONGAIR M.

Abstract (from CDS):

We present maps, source lists and derived number counts from the largest, unbiased, extragalactic submillimetre (submm) survey so far undertaken with the SCUBA camera on the James Clerk Maxwell Telescope (JCMT). Our maps are located in two regions of sky (ELAIS N2 and Lockman-Hole E) and cover 260arcmin2, to a typical rms noise level of σ850≃2.5mJy.beam–1. We have reduced the data using both the standard JCMT surf procedures, and our own IDL-based pipeline which produces zero-footprint maps and noise images. The uncorrelated noise maps produced by the latter approach have enabled us to apply a maximum likelihood method to measure the statistical significance of each peak in our maps, leading to properly quantified errors on the flux density of all potential sources.

We detect 19 sources with signal-to-noise ratios (S/N)>4, and 38 with S/N>3.5. To assess both the completeness of this survey and the impact of source confusion as a function of flux density, we have applied our source-extraction algorithm to a series of simulated images. The result is a new estimate of the submm source counts over the flux-density range S850≃5-15mJy, which we compare with estimates derived by other workers, and with the predictions of a number of models.

Our best estimate of the cumulative source count at S850>8mJy is 320+80–100 per square degree. Assuming that the majority of sources lie at z >1.5, this result implies that the comoving number density of high-redshift galaxies forming stars at a rate in excess of 1000M☉.yr–1 is ≃ 10–5 Mpc–3, with only a weak dependence on the precise redshift distribution. This number density corresponds to the number density of massive ellipticals with L >3-4L * in the present-day Universe, and is also the same as the comoving number density of comparably massive, passively evolving objects in the redshift band 1<z <2 inferred from recent surveys of extremely red objects. Thus the bright submm sources uncovered by this survey can plausibly account for the formation of all present-day massive ellipticals. Improved redshift constraints, and ultimately an improved measure of submm source clustering can refine or refute this picture.


Abstract Copyright: 2002 Blackwell Science Ltd

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: starburst - cosmology: observations - infrared: galaxies

Nomenclature: Table 5: [SFD2002] N2 NN (Nos 1-36). Table 6: [SFD2002] LHE NN (Nos 1-36).

Simbad objects: 88

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Number of rows : 88
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 RAFGL 618 pA* 04 42 53.6242032600 +36 06 53.400902220   16.32   12.59   C-rich 1027 0
2 4C 41.17 rG 06 50 52.098 +41 30 30.53           ~ 349 1
3 OH 231.8+04.2 OH* 07 42 16.947 -14 42 50.20           M10III+A 548 0
4 4C 39.25 Bla 09 27 03.01394144 +39 02 20.8518067   17.17 17.00 16.486   ~ 1036 1
5 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2455 0
6 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
7 [CCM2006] Lock850.29 smm 10 51 31.305 +57 20 40.00           ~ 13 0
8 [IGS2002] LE 850.13 smm 10 51 33.6 +57 26 41           ~ 5 0
9 [SFD2002] LHE 33 smm 10 51 33.8 +57 19 29           ~ 1 0
10 [SFD2002] LHE 24 smm 10 51 42.9 +57 24 12           ~ 2 0
11 [CCM2006] Lock850.60 smm 10 51 43.900 +57 24 43.60       27.24 27.77 ~ 13 0
12 [SFD2002] LHE 23 smm 10 51 47.0 +57 24 51           ~ 3 0
13 NAME SMM J105151.69+572636.0 smm 10 51 51.690 +57 26 36.09   27.28   25.20 23.99 ~ 42 0
14 SHADES J105153+571839 smm 10 51 53.690 +57 18 34.90           ~ 8 0
15 NAME SMM J105155.7+572312 smm 10 51 55.470 +57 23 12.77   26.91   26.08 26.22 ~ 29 0
16 [SFD2002] LHE 35 smm 10 51 57.6 +57 26 03           ~ 7 0
17 NAME SMM J105158.02+571800.2 rG 10 51 58.018 +57 18 00.27   25.78   24.54 23.67 ~ 36 0
18 [IGS2002] LE 850.05 smm 10 51 59.3 +57 17 18           ~ 6 0
19 NAME SMM J105200.22+572420.2 EmG 10 51 59.856 +57 24 24.91   22.95   22.05 21.53 ~ 35 0
20 SHADES J105200+572038 smm 10 52 00.445 +57 20 40.16   24.61   23.74 23.14 ~ 8 0
21 NAME SMM J105201.25+572445.7 smm 10 52 01.417 +57 24 43.04       26.29 25.52 ~ 48 1
22 [CCM2006] Lock850.40 smm 10 52 01.721 +57 19 17.00   26.33   25.95 25.68 ~ 11 0
23 [SFD2002] LHE 36 smm 10 52 03.5 +57 16 54           ~ 1 0
24 [SFD2002] LHE 31 smm 10 52 03.9 +57 20 07           ~ 1 0
25 [ADP2010] AzLOCK.56 smm 10 52 04.013 +57 25 24.20   28.08   26.20 25.81 ~ 22 0
26 [MDI2012] AzLOCK7 smm 10 52 04.079 +57 26 58.52   25.57   24.48 24.17 ~ 30 0
27 [SFD2002] LHE 22 smm 10 52 05.7 +57 20 53           ~ 1 0
28 NAME SMM J105207.49+571904.0 rG 10 52 07.490 +57 19 04.01   25.89   25.62 25.27 ~ 39 0
29 NAME Lockman Hole East Field reg 10 52 08.82 +57 21 33.8           ~ 39 0
30 [SFD2002] LHE 34 smm 10 52 09.9 +57 20 40           ~ 1 0
31 [BI2008] SMG03 smm 10 52 15.636 +57 25 04.26   26.86   25.53 24.79 ~ 11 0
32 [IGS2002] LE 850.17 smm 10 52 16.8 +57 19 23           ~ 6 0
33 [IGS2002] LE 850.09 smm 10 52 22.7 +57 19 32           ~ 6 0
34 NAME SMM J105224.6+572119 G 10 52 24.6 +57 21 19           ~ 11 0
35 [SFD2002] LHE 26 smm 10 52 27.3 +57 19 06           ~ 1 0
36 [CIR2010] J105227.648+572513.12 G 10 52 27.579 +57 25 12.46   26.38   25.17 24.97 ~ 19 0
37 [IGS2002] LE 850.19 smm 10 52 29.7 +57 26 19           ~ 4 0
38 NAME SMM J105230.6+572212 rG 10 52 30.717 +57 22 09.56   24.32   23.74 23.40 ~ 39 0
39 [SFD2002] LHE 28 smm 10 52 34.6 +57 20 02           ~ 1 0
40 [SFD2002] LHE 25 smm 10 52 36.0 +57 18 20           ~ 1 0
41 [IGS2002] LE 850.20 smm 10 52 37.7 +57 20 30           ~ 6 0
42 NAME SMM J10524+5724 smm 10 52 38.299 +57 24 35.76   26.45   24.90 24.21 ~ 37 0
43 [SFD2002] LHE 30 smm 10 52 42.2 +57 18 28           ~ 1 0
44 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
45 [FIK97] G1 EmG 13 59 49.430 +62 30 45.13           ~ 25 1
46 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
47 4C 63.20 rG 14 36 37.366 +63 19 13.03         23.6 ~ 80 1
48 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 326 0
49 FIRST J151422.4+363620 rG 15 14 22.482 +36 36 21.08           ~ 146 1
50 [SFD2002] N2 18 smm 16 36 11.4 +40 59 26           ~ 1 0
51 [SFD2002] N2 25 smm 16 36 18.3 +40 59 12           ~ 1 0
52 [IGS2002] N2 850.14 smm 16 36 19.7 +40 56 23           ~ 3 0
53 [IGS2002] N2 850.09 smm 16 36 22.4 +40 57 05           ~ 6 0
54 [SFD2002] N2 29 smm 16 36 24.1 +40 59 35           ~ 1 0
55 [SFD2002] N2 24 smm 16 36 26.9 +41 02 23           ~ 1 0
56 [SFD2002] N2 34 smm 16 36 27.0 +40 58 15           ~ 1 0
57 [SFD2002] N2 22 smm 16 36 27.9 +40 54 04           ~ 1 0
58 [SFD2002] N2 31 smm 16 36 28.1 +41 01 41           ~ 1 0
59 NAME SMM J163631.47+405546.9 AGN 16 36 31.4 +40 55 47   24.9       ~ 19 0
60 [SFD2002] N2 26 smm 16 36 32.0 +41 00 05           ~ 1 0
61 [GIB2004] N2 1200.3 smm 16 36 35.6 +40 55 58           ~ 5 0
62 [SFD2002] N2 19 smm 16 36 35.9 +41 01 38           ~ 1 0
63 NAME SMM J16363+4056 smm 16 36 39.01 +40 56 35.9   24.6 23.60   22.44 ~ 28 0
64 [SFD2002] N2 32 smm 16 36 39.8 +41 00 34           ~ 1 0
65 [IGS2002] N2 850.11 smm 16 36 44.5 +40 58 38           ~ 4 0
66 [SFD2002] N2 35 smm 16 36 44.8 +40 56 51           ~ 1 0
67 [SFD2002] N2 28 smm 16 36 47.2 +41 04 48           ~ 1 0
68 ELAIS N2 reg 16 36 48.0 +41 01 45           ~ 168 0
69 [SFD2002] N2 27 smm 16 36 48.3 +41 03 52           ~ 1 0
70 [IGS2002] N2 850.10 smm 16 36 48.8 +40 55 54           ~ 4 0
71 [SFD2002] N2 20 smm 16 36 49.4 +41 04 17           ~ 1 0
72 NAME SMM J163650.43+405734.5 Sy1 16 36 50.5 +40 57 34   23.3 23.30   21.83 ~ 91 0
73 [SFD2002] N2 33 smm 16 36 50.5 +40 58 54           ~ 1 0
74 [SFD2002] N2 17 smm 16 36 51.4 +41 05 06           ~ 2 0
75 [SFD2002] N2 16 smm 16 36 52.3 +41 05 52           ~ 2 0
76 [SFD2002] N2 36 smm 16 36 52.9 +41 02 52           ~ 1 0
77 [IGS2002] N2 850.03 smm 16 36 58.2 +41 04 42           ~ 6 0
78 NAME SMM J16366+4105 AGN 16 36 58.2 +41 05 24   26.0     24.48 ~ 56 0
79 NAME SMM J163658.8+405733 G 16 36 58.78 +40 57 28.1   23.9   22.50 21.55 ~ 30 0
80 [IGS2002] N2 850.12 smm 16 37 02.5 +41 01 23           ~ 6 0
81 [IGS2002] N2 850.06 smm 16 37 04.2 +40 55 45           ~ 7 0
82 NAME SMM J163704.3+410530 smm 16 37 04.34 +41 05 30.3   24.2     21.99 ~ 22 0
83 [SFD2002] N2 30 smm 16 37 07.5 +41 02 37           ~ 1 0
84 [IGS2002] N2 850.15 smm 16 37 10.2 +41 00 17           ~ 3 0
85 [SFD2002] N2 21 smm 16 37 10.5 +41 00 49           ~ 1 0
86 [SFD2002] N2 23 smm 16 37 19.5 +41 01 38           ~ 1 0
87 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
88 V* V1610 Cyg pA* 21 02 18.27 +36 41 37.0           F5Iae 892 1

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