2013MNRAS.435.2753P

Query : 2013MNRAS.435.2753P

2013MNRAS.435.2753P - Mon. Not. R. Astron. Soc., 435, 2753-2763 (2013/November-2)

H-ATLAS: estimating redshifts of Herschel sources from sub-mm fluxes.

PEARSON E.A., EALES S., DUNNE L., GONZALEZ-NUEVO J., MADDOX S., AGUIRRE J.E., BAES M., BAKER A.J., BOURNE N., BRADFORD C.M., CLARK C.J.R., COORAY A., DARIUSH A., DE ZOTTI G., DYE S., FRAYER D., GOMEZ H.L., HARRIS A.I., HOPWOOD R., IBAR E., IVISON R.J., JARVIS M., KRIPS M., LAPI A., LUPU R.E., MICHALOWSKI M.J., ROSENMAN M., SCOTT D., VALIANTE E., VALTCHANOV I., VAN DER WERF P. and VIEIRA J.D.

Abstract (from CDS):

Upon its completion, the Herschel Astrophysics Terahertz Large Area Survey (H-ATLAS) will be the largest sub-millimetre survey to date, detecting close to half-a-million sources. It will only be possible to measure spectroscopic redshifts for a small fraction of these sources. However, if the rest-frame spectral energy distribution (SED) of a typical H-ATLAS source is known, this SED and the observed Herschel fluxes can be used to estimate the redshifts of the H-ATLAS sources without spectroscopic redshifts. In this paper, we use a sub-set of 40 H-ATLAS sources with previously measured redshifts in the range 0.5 < z < 4.2 to derive a suitable average template for high-redshift H-ATLAS sources. We find that a template with two dust components (Tc = 23.9K, Th = 46.9K and ratio of mass of cold dust to mass of warm dust of 30.1) provides a good fit to the rest-frame fluxes of the sources in our calibration sample. We use a jackknife technique to estimate the accuracy of the redshifts estimated with this template, finding a root mean square of Δz/(1 + z) = 0.26. For sources for which there is prior information that they lie at z > 1, we estimate that the rms of Δz/(1 + z) = 0.12. We have used this template to estimate the redshift distribution for the sources detected in the H-ATLAS equatorial fields, finding a bimodal distribution with a mean redshift of 1.2, 1.9 and 2.5 for 250, 350 and 500µm selected sources, respectively.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): galaxies: high-redshift - galaxies: photometry - submillimetre: galaxies

Simbad objects: 43

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Number of rows : 43
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 H-ATLAS J083713.3+000035 G 08 37 13.277 +00 00 34.32           ~ 1 0
2 SDSS J084216.99+010917.8 G 08 42 16.9911773688 +01 09 17.821941624           ~ 3 0
3 [VV2010c] J084846.4+022034 Sy2 08 48 46.35 +02 20 34.2   22.36 21.58     ~ 14 0
4 H-ATLAS J084933.4+021443 G 08 49 33.49 +02 14 44.4           ~ 38 0
5 FIRST J085230.1+002845 rG 08 52 30.098 +00 28 45.30           ~ 3 0
6 NAME G09v1.40 G 08 53 58.6749643920 +01 55 35.473138860           ~ 19 0
7 H-ATLAS J090302.9-014127 LeG 09 03 02.9 -01 41 27           ~ 29 0
8 SDP 81 LeG 09 03 11.574 +00 39 06.55           ~ 106 0
9 SDP 70 smm 09 03 59.6 -00 45 56           ~ 2 0
10 [VV2006] J090420.9+013038 QSO 09 04 20.8844865552 +01 30 38.041833672   17.15 16.89     ~ 34 0
11 H-ATLAS J090740.0-004200 LeG 09 07 40.0 -00 42 00           ~ 32 0
12 2SLAQ J090758.03-001447.7 EmG 09 07 58.0336138800 -00 14 47.666703300           ~ 4 0
13 H-ATLAS J091043.1-000321 LeG 09 10 43.1 -00 03 21           ~ 34 0
14 HerBS 59 LeG 09 13 05.0 -00 53 43           ~ 40 0
15 NAME G09v1.326 G 09 18 40.8 +02 30 47           ~ 18 0
16 SDSS J092340.15+005737.0 G 09 23 40.155 +00 57 37.02           ~ 3 0
17 H-ATLAS J113243.0-005108 G 11 32 43.1 -00 51 08           ~ 10 0
18 NAME G12v2.43 G 11 35 26.3 -01 46 05           ~ 23 0
19 SDSS J113859.31-002933.4 G 11 38 59.322 -00 29 33.34           ~ 3 0
20 [VV2006] J114023.0-001045 QSO 11 40 23.0420509536 -00 10 43.611060072   19.30 19.12     ~ 29 0
21 SDSS J114619.95-014356.8 G 11 46 19.947 -01 43 56.69           ~ 3 0
22 NAME G12.v2.30 LeG 11 46 37.9 -00 11 32           ~ 34 0
23 H-ATLAS J115820.1-013752 G 11 58 20.2 -01 37 53           ~ 13 0
24 SDSS J120246.08-005221.9 G 12 02 46.0872385488 -00 52 21.919639224           ~ 2 0
25 SDSS J120248.42-022943.7 G 12 02 48.426 -02 29 43.75           ~ 3 0
26 SDSS J121354.05-024315.9 G 12 13 54.052 -02 43 15.96           ~ 3 0
27 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
28 SDSS J140640.04-005950.1 G 14 06 40.051 -00 59 50.31           ~ 3 0
29 SDSS J140746.58-010630.3 G 14 07 46.582 -01 06 30.33           ~ 3 0
30 SDSS J140930.80-013805.3 G 14 09 30.803 -01 38 05.40           ~ 3 0
31 [VV2006] J141149.0-011439 QSO 14 11 49.0005832920 -01 14 38.944341240   18.9 18.87 18.8   ~ 28 0
32 SDSS J141343.47+004043.5 G 14 13 43.470 +00 40 43.61           ~ 3 0
33 NAME G15v2.235 LeG 14 13 51.9 -00 00 26           ~ 20 0
34 SDSS J141429.12-000900.6 G 14 14 29.127 -00 09 00.62     20.46     ~ 5 0
35 SDSS J141815.66+010248.4 G 14 18 15.661 +01 02 48.47           ~ 4 0
36 NAME G15.v2.779 LeG 14 24 13.9 +02 23 04           ~ 59 0
37 SDSS J142534.02+023709.7 G 14 25 34.023 +02 37 09.77           ~ 3 0
38 NAME G15v2.19 G 14 29 35.232 -00 28 35.69           ~ 23 0
39 SDSS J143703.90+014127.3 G 14 37 03.900 +01 41 27.36           ~ 3 0
40 H-ATLAS J143845.8+013503 LeG 14 38 45.900 +01 35 03.66           ~ 3 0
41 SDSS J143858.18-010539.1 G 14 38 58.184 -01 05 39.10           ~ 5 0
42 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
43 NAME Eyelash LeG 21 35 11.60 -01 02 52.0           ~ 245 0

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