K. Rowlands
Herschel-ATLAS: properties of dusty massive galaxies at low and high redshifts
Rowlands, K.; Dunne, L.; Dye, S.; Aragón-Salamanca, A.; Maddox, S.; da Cunha, E.; Smith, D.J.B.; Bourne, N.; Eales, S.; Gomez, H.L.; Smail, I.; Alpaslan, M.; Clark, C.J.R.; Driver, S.; Ibar, E.; Ivison, R.J.; Robotham, A.; Smith, M.W.L.; Valiante, E.
Authors
L. Dunne
S. Dye
A. Aragón-Salamanca
S. Maddox
E. da Cunha
D.J.B. Smith
N. Bourne
S. Eales
H.L. Gomez
Professor Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
M. Alpaslan
C.J.R. Clark
S. Driver
E. Ibar
R.J. Ivison
A. Robotham
M.W.L. Smith
E. Valiante
Abstract
We present a comparison of the physical properties of a rest-frame 250-μm-selected sample of massive, dusty galaxies from 0 < z < 5.3. Our sample comprises 29 high-redshift submillimetre galaxies (SMGs) from the literature and 843 dusty galaxies at z < 0.5 from the Herschel-Astrophysical TeraHertz Large Area Survey (H-ATLAS), selected to have a similar stellar mass to the SMGs. The z > 1 SMGs have an average star formation rate (SFR) of 390+80−70 M⊙ yr−1, which is 120 times that of the low-redshift sample matched in stellar mass to the SMGs (SFR = 3.3 ± 0.2 M⊙ yr−1). The SMGs harbour a substantial mass of dust (1.2+0.3−0.2×109 M⊙), compared to (1.6 ± 0.1) × 108 M⊙ for low-redshift dusty galaxies. At low redshifts, the dust luminosity is dominated by the diffuse interstellar medium, whereas a large fraction of the dust luminosity in SMGs originates from star-forming regions. At the same dust mass, SMGs are offset towards a higher SFR compared to the low-redshift H-ATLAS galaxies. This is not only due to the higher gas fraction in SMGs but also because they are undergoing a more efficient mode of star formation, which is consistent with their bursty star formation histories. The offset in SFR between SMGs and low-redshift galaxies is similar to that found in CO studies, suggesting that dust mass is as good a tracer of molecular gas as CO.
Citation
Rowlands, K., Dunne, L., Dye, S., Aragón-Salamanca, A., Maddox, S., da Cunha, E., …Valiante, E. (2014). Herschel-ATLAS: properties of dusty massive galaxies at low and high redshifts. Monthly Notices of the Royal Astronomical Society, 441(2), 1017-1039. https://doi.org/10.1093/mnras/stu510
Journal Article Type | Article |
---|---|
Publication Date | Jun 21, 2014 |
Deposit Date | Nov 17, 2014 |
Publicly Available Date | Mar 29, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 441 |
Issue | 2 |
Pages | 1017-1039 |
DOI | https://doi.org/10.1093/mnras/stu510 |
Keywords | Dust, Extinction, Galaxies: evolution, Galaxies: fundamental parameters, Galaxies: high-redshift, Galaxies: ISM, Submillimetre: galaxies. |
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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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