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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 710042.0, MPI für Astronomie / Publikationen_mpia
Herschel-ATLAS: properties of dusty massive galaxies at low and high redshifts
Authors: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.
Date of Publication (YYYY-MM-DD):2014
Title of Journal:Monthly Notices of the Royal Astronomical Society
Volume:441
Issue / Number:2
Start Page:1017
End Page:1039
Audience:Not Specified
Abstract / Description:We present a comparison of the physical properties of a rest-frame 250-mum-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&sun; 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&sun; yr-1). The SMGs harbour a substantial mass of dust (1.2^{+0.3}_{-0.2}× {10}^9 M&sun;), compared to (1.6 ± 0.1) × 108 M&sun; 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.
Free Keywords:dust; extinction; galaxies: evolution; galaxies: fundamental parameters; galaxies: high-redshift; galaxies: ISM; submillimetre: galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0035-8711 %R 10.1093/mnras/stu510
URL:http://cdsads.u-strasbg.fr/abs/2014MNRAS.441.1017R
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