D’Silva, Jordan C. J., Driver, Simon P., Robotham, Aaron S. G., Battisti, Andrew, da Cunha, Elisabete, Davies, Luke J. M., Eales, Stephen  ORCID: https://orcid.org/0000-0002-7394-426X and Lagos, Claudia del P.
2026.
The contribution of stars, dust, neutral gas and supermassive black holes in galaxies to the Cosmic Baryon Inventory.
Monthly Notices of the Royal Astronomical Society
549
(1)
, stag873.
10.1093/mnras/stag873
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Abstract
We compute the cosmic stellar, dust and neutral gas mass history at 0 < z ≲ 3 using ProSpect spectral energy distribution modelling of ≈800 000 galaxies in the Galaxy and Mass Assembly (GAMA) survey and the Deep Extragalactic VIsible Legacy Survey (DEVILS). The cosmic dust mass history broadly follows the shape of the cosmic star formation history; though, the decline is slower, suggestive of a slowing rate of dust growth and destruction as the star formation declines past its peak at z ≈ 2. Neutral gas masses were estimated by scaling the dust masses by the metallicity-dependent dust-to-gas ratio. The neutral gas mass density as traced by the dust is an average of ≈0.7 dex lower than that measured from 21cm experiments, most likely due to differences in the spatial scales inhabited by dust and HI. Folding in measurements of the supermassive black hole mass density obtained previously with similar data and methods, we present a self-consistent census of the baryons confined to galaxies. Stars, neutral gas, SMBHs and dust contained within the optical radii of galaxies account for ≈5 per cent of the baryons. Most of the remaining ≈95 per cent of baryons must be ionised and dispersed throughout the interstellar, circumgalactic and intergalactic media within, around and between galaxies.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Additional Information: | License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Start Date: 2026-05-08 |
| Publisher: | Oxford University Press |
| ISSN: | 0035-8711 |
| Date of First Compliant Deposit: | 18 May 2026 |
| Date of Acceptance: | 6 May 2026 |
| Last Modified: | 01 Aug 2026 21:32 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/187037 |
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