Issue |
A&A
Volume 696, April 2025
|
|
---|---|---|
Article Number | A89 | |
Number of page(s) | 19 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/202453570 | |
Published online | 08 April 2025 |
Galaxy And Mass Assembly (GAMA): Environment-dependent galaxy stellar mass functions in the low-redshift Universe
1
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
2
Cluster of Excellence Quantum Universe, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
3
International Centre for Radio Astronomy Research (ICRAR), University of Western Australia, Crawley, WA 6009, Australia
4
Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
⋆ Corresponding author; antonio.sbaffoni@uni-hamburg.de
Received:
20
December
2024
Accepted:
13
February
2025
From a carefully selected sample of 52 089 galaxies and 10 429 groups, we investigate the variation of the low-redshift galaxy stellar mass function (GSMF) in the equatorial Galaxy And Mass Assembly (GAMA) dataset as a function of four different environmental properties. We find that: (i) The GSMF is not strongly affected by distance to the nearest filament but rather by group membership. (ii) More massive halos tend to host more massive galaxies and exhibit a steeper decline with stellar mass in the number of intermediate-mass galaxies. This result is robust against the choice of dynamical and luminosity-based group halo mass estimates. (iii) The GSMF of group galaxies does not depend on the position within a filament, but for groups outside of filaments, the characteristic mass of the GSMF is lower. Finally, our global GSMF is well described by a double Schechter function with the following parameters: log[M⋆/(M⊙h70−2)] = 10.76 ± 0.01, Φ1⋆ = (3.75 ± 0.09)×10−3 Mpc−3 h703, α1 = −0.86 ± 0.03, Φ2⋆ = (0.13 ± 0.05)×10−3 Mpc−3 h703, and α2 = −1.71 ± 0.06. This result is consistent with previous GAMA studies in terms of M⋆, although we find lower values for both α1 and α2.
Key words: galaxies: distances and redshifts / galaxies: evolution / galaxies: fundamental parameters / galaxies: luminosity function / mass function / galaxies: stellar content / large-scale structure of Universe
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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