The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population

I.G. Roseboom; J.S. Dunlop; M. Cirasuolo; J.E. Geach; I. Smail; M. Halpern; P. van der Werf; O. Almaini; V. Arumugam; V. Asboth; R. Auld; A. Blain; M.N. Bremer; J. Bock; R.A.A. Bowler; F. Buitrago; E. Chapin; S. Chapman; A. Chrysostomou; C. Clarke; A. Conley; Kristen Coppin; A. L. R. Danielson; D. Farrah; J. Glenn; E. Hatziminaoglou; E. Ibar; R.J. Ivison; T. Jenness; E. van Kampen; A. Karim; T. Mackenzie; G. Marsden; R. Meijerink; M. J. Michałowski; S.J. Oliver; M.J. Page; E. Pearson; D. Scott; J.M. Simpson; Daniel Smith; M. Spaans; A.M. Swinbank; M. Symeonidis; T. Targett; E. Valiante; M. Viero; L. Wang; C.J. Willott; M. Zemcov

doi:10.1093/mnras/stt1577

The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population

I.G. Roseboom, J.S. Dunlop, M. Cirasuolo, J.E. Geach, I. Smail, M. Halpern, P. van der Werf, O. Almaini, V. Arumugam, V. Asboth, R. Auld, A. Blain, M.N. Bremer, J. Bock, R.A.A. Bowler, F. Buitrago, E. Chapin, S. Chapman, A. Chrysostomou, C. ClarkeA. Conley, Kristen Coppin, A. L. R. Danielson, D. Farrah, J. Glenn, E. Hatziminaoglou, E. Ibar, R.J. Ivison, T. Jenness, E. van Kampen, A. Karim, T. Mackenzie, G. Marsden, R. Meijerink, M. J. Michałowski, S.J. Oliver, M.J. Page, E. Pearson, D. Scott, J.M. Simpson, Daniel Smith, M. Spaans, A.M. Swinbank, M. Symeonidis, T. Targett, E. Valiante, M. Viero, L. Wang, C.J. Willott, M. Zemcov

Centre for Astrophysics Research

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Abstract

We investigate the multiwavelength properties of a sample of 450-μm-selected sources from the SCUBA-2 Cosmology Legacy Survey. A total of 69 sources were identified above 4σ in deep SCUBA-2 450-μm observations overlapping the UDS and COSMOS fields and covering 210 arcmin to a typical depth of σ = 1.5mJy. Reliable cross-identifications are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450-μm-selected sources is presented, showing a broad peak in the redshift range 1 <z <3 and a median of z = 1.4. Combining the SCUBA-2 photometry with Herschel SPIRE data from HerMES, the submm spectral energy distribution (SED) is examined via the use of modified blackbody fits, yielding aggregate values for the IR luminosity, dust temperature and emissivity of (L) = 10 L, (TD) = 42 ± 11K and (β) = 1.6 ± 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between TD and LIR and between βD and both stellar mass and effective radius. The connection between the star formation rate (SFR) and stellar mass is explored, with 24 per cent of 450-μm sources found to be 'starbursts', i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these 'starburst' galaxies are found to be consistent with the population of normal star-forming galaxies.

Original language	English
Pages (from-to)	430-448
Number of pages	19
Journal	Monthly Notices of the Royal Astronomical Society
Volume	436
Issue number	1
DOIs	https://doi.org/10.1093/mnras/stt1577
Publication status	Published - 1 Nov 2013

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Roseboom, I. G., Dunlop, J. S., Cirasuolo, M., Geach, J. E., Smail, I., Halpern, M., van der Werf, P., Almaini, O., Arumugam, V., Asboth, V., Auld, R., Blain, A., Bremer, M. N., Bock, J., Bowler, R. A. A., Buitrago, F., Chapin, E., Chapman, S., Chrysostomou, A., ... Zemcov, M. (2013). The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population. Monthly Notices of the Royal Astronomical Society, 436(1), 430-448. https://doi.org/10.1093/mnras/stt1577

@article{15be9976fcb74baea34e02e714fbb0f5,

title = "The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population",

abstract = "We investigate the multiwavelength properties of a sample of 450-μm-selected sources from the SCUBA-2 Cosmology Legacy Survey. A total of 69 sources were identified above 4σ in deep SCUBA-2 450-μm observations overlapping the UDS and COSMOS fields and covering 210 arcmin to a typical depth of σ = 1.5mJy. Reliable cross-identifications are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450-μm-selected sources is presented, showing a broad peak in the redshift range 1 <z <3 and a median of z = 1.4. Combining the SCUBA-2 photometry with Herschel SPIRE data from HerMES, the submm spectral energy distribution (SED) is examined via the use of modified blackbody fits, yielding aggregate values for the IR luminosity, dust temperature and emissivity of (L) = 10 L, (TD) = 42 ± 11K and (β) = 1.6 ± 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between TD and LIR and between βD and both stellar mass and effective radius. The connection between the star formation rate (SFR) and stellar mass is explored, with 24 per cent of 450-μm sources found to be 'starbursts', i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these 'starburst' galaxies are found to be consistent with the population of normal star-forming galaxies.",

author = "I.G. Roseboom and J.S. Dunlop and M. Cirasuolo and J.E. Geach and I. Smail and M. Halpern and {van der Werf}, P. and O. Almaini and V. Arumugam and V. Asboth and R. Auld and A. Blain and M.N. Bremer and J. Bock and R.A.A. Bowler and F. Buitrago and E. Chapin and S. Chapman and A. Chrysostomou and C. Clarke and A. Conley and Kristen Coppin and Danielson, {A. L. R.} and D. Farrah and J. Glenn and E. Hatziminaoglou and E. Ibar and R.J. Ivison and T. Jenness and {van Kampen}, E. and A. Karim and T. Mackenzie and G. Marsden and R. Meijerink and Micha{\l}owski, {M. J.} and S.J. Oliver and M.J. Page and E. Pearson and D. Scott and J.M. Simpson and Daniel Smith and M. Spaans and A.M. Swinbank and M. Symeonidis and T. Targett and E. Valiante and M. Viero and L. Wang and C.J. Willott and M. Zemcov",

year = "2013",

month = nov,

day = "1",

doi = "10.1093/mnras/stt1577",

language = "English",

volume = "436",

pages = "430--448",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

number = "1",

}

Roseboom, IG, Dunlop, JS, Cirasuolo, M, Geach, JE, Smail, I, Halpern, M, van der Werf, P, Almaini, O, Arumugam, V, Asboth, V, Auld, R, Blain, A, Bremer, MN, Bock, J, Bowler, RAA, Buitrago, F, Chapin, E, Chapman, S, Chrysostomou, A, Clarke, C, Conley, A, Coppin, K, Danielson, ALR, Farrah, D, Glenn, J, Hatziminaoglou, E, Ibar, E, Ivison, RJ, Jenness, T, van Kampen, E, Karim, A, Mackenzie, T, Marsden, G, Meijerink, R, Michałowski, MJ, Oliver, SJ, Page, MJ, Pearson, E, Scott, D, Simpson, JM, Smith, D, Spaans, M, Swinbank, AM, Symeonidis, M, Targett, T, Valiante, E, Viero, M, Wang, L, Willott, CJ & Zemcov, M 2013, 'The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population', Monthly Notices of the Royal Astronomical Society, vol. 436, no. 1, pp. 430-448. https://doi.org/10.1093/mnras/stt1577

TY - JOUR

T1 - The SCUBA-2 cosmology legacy survey

T2 - Demographics of the 450-μm population

AU - Roseboom, I.G.

AU - Dunlop, J.S.

AU - Cirasuolo, M.

AU - Geach, J.E.

AU - Smail, I.

AU - Halpern, M.

AU - van der Werf, P.

AU - Almaini, O.

AU - Arumugam, V.

AU - Asboth, V.

AU - Auld, R.

AU - Blain, A.

AU - Bremer, M.N.

AU - Bock, J.

AU - Bowler, R.A.A.

AU - Buitrago, F.

AU - Chapin, E.

AU - Chapman, S.

AU - Chrysostomou, A.

AU - Clarke, C.

AU - Conley, A.

AU - Coppin, Kristen

AU - Danielson, A. L. R.

AU - Farrah, D.

AU - Glenn, J.

AU - Hatziminaoglou, E.

AU - Ibar, E.

AU - Ivison, R.J.

AU - Jenness, T.

AU - van Kampen, E.

AU - Karim, A.

AU - Mackenzie, T.

AU - Marsden, G.

AU - Meijerink, R.

AU - Michałowski, M. J.

AU - Oliver, S.J.

AU - Page, M.J.

AU - Pearson, E.

AU - Scott, D.

AU - Simpson, J.M.

AU - Smith, Daniel

AU - Spaans, M.

AU - Swinbank, A.M.

AU - Symeonidis, M.

AU - Targett, T.

AU - Valiante, E.

AU - Viero, M.

AU - Wang, L.

AU - Willott, C.J.

AU - Zemcov, M.

PY - 2013/11/1

Y1 - 2013/11/1

N2 - We investigate the multiwavelength properties of a sample of 450-μm-selected sources from the SCUBA-2 Cosmology Legacy Survey. A total of 69 sources were identified above 4σ in deep SCUBA-2 450-μm observations overlapping the UDS and COSMOS fields and covering 210 arcmin to a typical depth of σ = 1.5mJy. Reliable cross-identifications are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450-μm-selected sources is presented, showing a broad peak in the redshift range 1 <z <3 and a median of z = 1.4. Combining the SCUBA-2 photometry with Herschel SPIRE data from HerMES, the submm spectral energy distribution (SED) is examined via the use of modified blackbody fits, yielding aggregate values for the IR luminosity, dust temperature and emissivity of (L) = 10 L, (TD) = 42 ± 11K and (β) = 1.6 ± 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between TD and LIR and between βD and both stellar mass and effective radius. The connection between the star formation rate (SFR) and stellar mass is explored, with 24 per cent of 450-μm sources found to be 'starbursts', i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these 'starburst' galaxies are found to be consistent with the population of normal star-forming galaxies.

AB - We investigate the multiwavelength properties of a sample of 450-μm-selected sources from the SCUBA-2 Cosmology Legacy Survey. A total of 69 sources were identified above 4σ in deep SCUBA-2 450-μm observations overlapping the UDS and COSMOS fields and covering 210 arcmin to a typical depth of σ = 1.5mJy. Reliable cross-identifications are found for 58 sources (84 per cent) in Spitzer and Hubble Space Telescope WFC3/IR data. The photometric redshift distribution (dN/dz) of 450-μm-selected sources is presented, showing a broad peak in the redshift range 1 <z <3 and a median of z = 1.4. Combining the SCUBA-2 photometry with Herschel SPIRE data from HerMES, the submm spectral energy distribution (SED) is examined via the use of modified blackbody fits, yielding aggregate values for the IR luminosity, dust temperature and emissivity of (L) = 10 L, (TD) = 42 ± 11K and (β) = 1.6 ± 0.5, respectively. The relationship between these SED parameters and the physical properties of galaxies is investigated, revealing correlations between TD and LIR and between βD and both stellar mass and effective radius. The connection between the star formation rate (SFR) and stellar mass is explored, with 24 per cent of 450-μm sources found to be 'starbursts', i.e. displaying anomalously high specific SFRs. However, both the number density and observed properties of these 'starburst' galaxies are found to be consistent with the population of normal star-forming galaxies.

UR - http://www.scopus.com/inward/record.url?scp=84887061913&partnerID=8YFLogxK

U2 - 10.1093/mnras/stt1577

DO - 10.1093/mnras/stt1577

M3 - Article

AN - SCOPUS:84887061913

SN - 0035-8711

VL - 436

SP - 430

EP - 448

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

The SCUBA-2 cosmology legacy survey: Demographics of the 450-μm population

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