University of Sussex
Browse

Galaxy And Mass Assembly (GAMA): the galaxy stellar mass function to z = 0.1 from the r-band selected equatorial regions

Download (9.59 MB)
journal contribution
posted on 2023-06-09, 13:35 authored by A H Wright, A S G Robotham, S P Driver, M Alpaslan, S K Andrews, I K Baldry, J Bland-Hawthorn, S Brought, M J I Brown, M Colless, E da Cunha, L J M Davies, Alister W Graham, B W Holwerda, A M Hopkins, P R Kafle, L S Kelvin, Jonathan LovedayJonathan Loveday, S J Maddox, M J Meyer, A J Moffett, P Norberg, S Phillipps, K Rowlands, E N Taylor, L Wang, Stephen WilkinsStephen Wilkins
We derive the low-redshift galaxy stellar mass function (GSMF), inclusive of dust corrections, for the equatorial Galaxy And Mass Assembly (GAMA) data set covering 180 deg2. We construct the mass function using a density-corrected maximum volume method, using masses corrected for the impact of optically thick and thin dust. We explore the galactic bivariate brightness plane (M?–µ), demonstrating that surface brightness effects do not systematically bias our mass function measurement above 107.5 M?. The galaxy distribution in the M–µ plane appears well bounded, indicating that no substantial population of massive but diffuse or highly compact galaxies are systematically missed due to the GAMA selection criteria. The GSMF is fitted with a double Schechter function, with M*=1010.78±0.01±0.20M?, ??1=(2.93±0.40)×10-3h370 Mpc-3, a1 = -0.62 ± 0.03 ± 0.15, ??2=(0.63±0.10)×10-3h370 Mpc-3 and a2 = -1.50 ± 0.01 ± 0.15. We find the equivalent faint end slope as previously estimated using the GAMA-I sample, although we find a higher value of M*. Using the full GAMA-II sample, we are able to fit the mass function to masses as low as 107.5 ?M?, and assess limits to 106.5 ?M?. Combining GAMA-II with data from G10-COSMOS, we are able to comment qualitatively on the shape of the GSMF down to masses as low as 106?M?. Beyond the well-known upturn seen in the GSMF at 109.5, the distribution appears to maintain a single power-law slope from 109 to 106.5. We calculate the stellar mass density parameter given our best-estimate GSMF, finding O?=1.66+0.24-0.23±0.97h-170×10-3, inclusive of random and systematic uncertainties.

Funding

University of Sussex Astronomy Consolidated Grant 2017-2020; G2050; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P000525/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press

Issue

1

Volume

470

Page range

283-302

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Astronomy Centre Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-05-30

First Open Access (FOA) Date

2018-05-30

First Compliant Deposit (FCD) Date

2018-05-30

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC