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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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posted on 2023-06-09, 13:40 authored by R. A Beeston, A H Wright, S Maddox, H L Gomez, L Dunne, S P Driver, A. Robotham, C J R Clark, K Vinsen, T T Takeuchi, G Popping, N Bourne, M N Bremer, S Phillipps, A J Moffett, M Baes, J Bland-Hawthorn, S Broug, P De Vis, S A Eales, B W Holwerda, Jonathan LovedayJonathan Loveday, J Liske, M W L Smith, D J B Smith, E Valiante, C Vlahakis, L Wang
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) × 10^7 h^2/70 Mo, a = (-1.22 ± 0:01), F*= (6.26 ± 0.28) × 10^-3 h^3/70 Mpc^-3 dex^-1. The resulting dust mass density parameter integrated down to 10^4 M? is Od = (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 Od = (0.88 ± 0.03) × 10^-6 and Od = (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.

Funding

Astronomy rolling grant; G0278; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I000976/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Monthly Notices Of The Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-06-07

First Open Access (FOA) Date

2018-06-07

First Compliant Deposit (FCD) Date

2018-06-06

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