J/MNRAS/421/3027 Statistical study of galaxy dust emissions (Bourne+, 2012)
Herschel-ATLAS/GAMA: a census of dust in optically selected galaxies from
stacking at submillimetre wavelengths.
Bourne N., Maddox S.J., Dunne L., Auld R., Baes M., Baldry I.K.,
Bonfield D.G., Cooray A., Croom S.M., Dariush A., De Zotti G., Driver S.P.,
Dye S., Eales S., Gomez H.L., Gonzalez-Nuevo J., Hopkins A.M., Ibar E.,
Jarvis M.J., Lapi A., Madore B., Michalowski M.J., Pohlen M., Popescu C.C.,
Rigby E.E., Seibert M., Smith D.J.B., Tuffs R.J., Van Der Werf P.,
Brough S., Buttiglione S., Cava A., Clements D.L., Conselice C.J.,
Fritz J., Hopwood R., Ivison R.J., Jones D.H., Kelvin L.S., Liske J.,
Loveday J., Norberg P., Robotham A.S.G., Rodighiero G., Temi P.
<Mon. Not. R. Astron. Soc., 421, 3027-3059 (2012)>
=2012MNRAS.421.3027B 2012MNRAS.421.3027B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry ; Photometry, millimetric/submm
Keywords: galaxies: evolution - galaxies: ISM - galaxies: statistics -
submillimetre: diffuse background - submillimetre: galaxies
Abstract:
We use the Herschel-ATLAS survey to conduct the first large-scale
statistical study of the submillimetre properties of optically
selected galaxies. Using ∼80000 r-band selected galaxies from
126deg2 of the GAMA survey, we stack into submillimetre imaging at
250, 350 and 500um to gain unprecedented statistics on the dust
emission from galaxies at z<0.35. We find that low-redshift galaxies
account for 5 per cent of the cosmic 250-um background (4 per cent at
350um; 3 per cent at 500um), of which approximately 60 per cent
comes from 'blue' and 20 per cent from 'red' galaxies
(rest-frame g-r).
Description:
We base our selection function on the GAMA 'Main Survey' (Baldry et
al. 2010MNRAS.404...86B 2010MNRAS.404...86B).
For the submm imaging, we use SPIRE images at 250, 350 and 500um of
the three equatorial GAMA fields in H-ATLAS.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 85 Results of stacking in bins of g-r colour,
redshift, and absolute magnitude
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See also:
J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- C [BGR] Colour bin Blue / Green / Red
3- 6 F4.2 --- z Median redshift in bin (2)
8- 12 F5.1 mag rMAG Median absolute r magnitude
14- 17 I4 --- N Count in the bin
19- 23 F5.2 mJy S250 background-subtracted flux for SPIRE 250um band
25- 29 F5.1 --- S/N250 signal-to-noise ratio for SPIRE 250um band
31- 34 F4.2 mJy s250 Measurement error (3)
36- 39 F4.2 mJy e_S250 Statistical error on the median flux S250 (4)
41- 45 E5.1 --- KS250 KS probability that the distribution of fluxes
in each bin is the same as that at a set of
random positions, for SPIRE 250um band
47- 51 F5.2 mJy S350 background-subtracted flux for SPIRE 350um band
53- 57 F5.1 --- S/N350 signal-to-noise ratio for SPIRE 350um band
59- 62 F4.2 mJy s350 Measurement error (3)
64- 67 F4.2 mJy e_S350 Statistical error on the median flux S350 (4)
69- 73 E5.1 --- KS350 KS probability that the distribution of fluxes
in each bin is the same as that at a set of
random positions, for SPIRE 350um band
75- 78 F4.2 mJy S500 background-subtracted flux for SPIRE 500um band
80- 83 F4.1 --- S/N500 signal-to-noise ratio for SPIRE 500um band
85- 88 F4.2 mJy s500 Measurement error (3)
90- 93 F4.2 mJy e_S500 Statistical error on the median flux S500 (4)
95- 99 E5.1 --- KS500 KS probability that the distribution of fluxes
in each bin is the same as that at a set of
random positions, for SPIRE 500um band
101-104 F4.2 mag K'250 Median k-correction for SPIRE 250um band (5)
106-109 F4.2 mag K'350 Median k-correction for SPIRE 350um band (5)
111-114 F4.2 mag K'500 Median k-correction for SPIRE 500um band (5)
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Note (2): median redshift z in bin: approximate z bin boundaries are
0.01, 0.12, 0.17, 0.22, 0.28, 0.35
Note (3): Measurement error computed from the mean variance of positions in the
stack, divided by sqrt(N), and including the error on background subtraction.
Note (4): Statistical error on the median flux following
Gott et al. (2001ApJ...549....1G 2001ApJ...549....1G).
Note (5): median k-correction K'=K(z)/(1+z) in the bin.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Mar-2013