GAMA/H-ATLAS : the local dust mass function and cosmic density as a function of galaxy type-A benchmark for models of galaxy evolution
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We present the dust mass function (DMF) of 15,750 galaxies with redshift z < 0.1, drawn from the overlapping area of the GAMA and H-ATLAS surveys. The DMF is derived using the density corrected Vmax method, where we estimate Vmax using: (i) the normal photometric selection limit (pVmax) and (ii) a bivariate brightness distribution (BBD) technique, which accounts for two selection effects. We fit the data with a Schechter function, and find M∗ = (4.65 ± 0.18) × 107 h270 M⊙, α = (−1.22 ± 0.01), φ∗ = (6.26 ± 0.28) × 10−3 h370 Mpc−3 dex−1. The resulting dust mass density parameter integrated down to 104 M⊙ is Ωd = (1.11 ± 0.02) × 10−6 which implies the mass fraction of baryons in dust is fmb = (2.40±0.04) ×10−5; cosmic variance adds an extra 7-17 per cent uncertainty to the quoted statistical errors. Our measurements have fewer galaxies with high dust mass than predicted by semi-analytic models. This is because the models include too much dust in high stellar mass galaxies. Conversely, our measurements find more galaxies with high dust mass than predicted by hydrodynamical cosmological simulations. This is likely to be from the long timescales for grain growth assumed in the models. We calculate DMFs split by galaxy type and find dust mass densities of Ωd = (0.88 ± 0.03) × 10−6 and Ωd = (0.060 ± 0.005) × 10−6 for late-types and early-types respectively. Comparing to the equivalent galaxy stellar mass functions (GSMF) we find that the DMF for late-types is well matched by the GMSF scaled by (8.07 ± 0.35) × 10−4.
Beeston , R A , Wright , A H , Maddox , S , Gomez , H L , Dunne , L , Driver , S P , Robotham , A , Clark , C J R , Vinsen , K , Takeuchi , T T , Popping , G , Bourne , N , Bremer , M N , Phillipps , S , Moffett , A J , Baes , M , Brough , S , Vis , P D , Eales , S A , Holwerda , B W , Loveday , J , Smith , M W L , Smith , D J B , Vlahakis , C & Wang , L 2018 , ' GAMA/ H -ATLAS : the local dust mass function and cosmic density as a function of galaxy type-A benchmark for models of galaxy evolution ' , Monthly Notices of the Royal Astronomical Society , vol. 479 , no. 1 , pp. 1077–1099 . https://doi.org/10.1093/mnras/sty1460
Monthly Notices of the Royal Astronomical Society
© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/sty1460
DescriptionRAB, HLG, SJM, and LD acknowledge support from the European Research Council (ERC) in the form of Consolidator Grant CosmicDust (ERC-2014-CoG-647939, PI HL Gomez). LD, SJM and NB acknowledge support from European Research Council Advanced Investigator Grant COSMICISM, 321302. CJRC acknowledges support from the ERC in the form of the 7th framework programme (FP7) grant DustPedia (PI Jon Davies, proposal 606824).
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