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Galaxy And Mass Assembly (GAMA): Data Release 4 and the z < 0.1 total and z < 0.08 morphological galaxy stellar mass functions

Driver, Simon P and Bellstedt, Sabine and Robotham, Aaron S G and Baldry, Ivan K and Davies, Luke J and Liske, Jochen and Obreschkow, Danail and Taylor, Edward N and Wright, Angus H and Alpaslan, Mehmet and Bamford, Steven P and Bauer, Amanda E and Bland-Hawthorn, Joss and Bilicki, Maciej and Bravo, Matías and Brough, Sarah and Casura, Sarah and Cluver, Michelle E and Colless, Matthew and Conselice, Christopher J and Croom, Scott M and de Jong, Jelte and D’Eugenio, Franceso and De Propris, Roberto and Dogruel, Burak and Drinkwater, Michael J and Dvornik, Andrej and Farrow, Daniel J and Frenk, Carlos S and Giblin, Benjamin and Graham, Alister W and Grootes, Meiert W and Gunawardhana, Madusha L P and Hashemizadeh, Abdolhosein and Häußler, Boris and Heymans, Catherine and Hildebrandt, Hendrik and Holwerda, Benne W and Hopkins, Andrew M and Jarrett, Tom H and Heath Jones, D and Kelvin, Lee S and Koushan, Soheil and Kuijken, Konrad and Lara-López, Maritza A and Lange, Rebecca and López-Sánchez, Ángel R and Loveday, Jon and Mahajan, Smriti and Meyer, Martin and Moffett, Amanda J and Napolitano, Nicola R and Norberg, Peder and Owers, Matt S and Radovich, Mario and Raouf, Mojtaba and Peacock, John A and Phillipps, Steven and Pimbblet, Kevin A and Popescu, Cristina and Said, Khaled and Sansom, Anne E and Seibert, Mark and Sutherland, Will J and Thorne, Jessica E and Tuffs, Richard J and Turner, Ryan and van der Wel, Arjen and van Kampen, Eelco and Wilkins, Steve M (2022) 'Galaxy And Mass Assembly (GAMA): Data Release 4 and the z < 0.1 total and z < 0.08 morphological galaxy stellar mass functions.', Monthly Notices of the Royal Astronomical Society, 513 (1). pp. 439-467.


In Galaxy And Mass Assembly Data Release 4 (GAMA DR4), we make available our full spectroscopic redshift sample. This includes 248 682 galaxy spectra, and, in combination with earlier surveys, results in 330 542 redshifts across five sky regions covering ∼250 deg2. The redshift density, isthe highest available over such a sustained area, has exceptionally high completeness (95 per cent to rKiDS = 19.65 mag), and is well-suited for the study of galaxy mergers, galaxy groups, and the low redshift (z < 0.25) galaxy population. DR4 includes 32 value-added tables or Data Management Units (DMUs) that provide a number of measured and derived data products including GALEX, ESO KiDS, ESO VIKING, WISE, and Herschel Space Observatory imaging. Within this release, we provide visual morphologies for 15 330 galaxies to z < 0.08, photometric redshift estimates for all 18 million objects to rKiDS ∼ 25 mag, and stellar velocity dispersions for 111 830 galaxies. We conclude by deriving the total galaxy stellar mass function (GSMF) and its sub-division by morphological class (elliptical, compact-bulge and disc, diffuse-bulge and disc, and disc only). This extends our previous measurement of the total GSMF down to 106.75 M h−2 70 and we find a total stellar mass density of ρ∗ = (2.97 ± 0.04) × 108 M h70 Mpc−3 or ∗ = (2.17 ± 0.03) × 10−3 h−1 70 . We conclude that at z < 0.1, the Universe has converted 4.9 ± 0.1 per cent of the baryonic mass implied by big bang Nucleosynthesis into stars that are gravitationally bound within the galaxy population.

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Publisher statement:© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Date accepted:17 February 2022
Date deposited:23 June 2022
Date of first online publication:02 March 2022
Date first made open access:23 June 2022

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