Galaxy And Mass Assembly (GAMA): stellar mass functions by Hubble type

Lee S. Kelvin*, Simon P. Driver, Aaron S. G. Robotham, Edward N. Taylor, Alister W. Graham, Mehmet Alpaslan, Ivan Baldry, Steven P. Bamford, Amanda E. Bauer, Joss Bland-Hawthorn, Michael J. I. Brown, Matthew Colless, Christopher J. Conselice, Benne W. Holwerda, Andrew M. Hopkins, Maritza A. Lara-Lopez, Jochen Liske, Angel R. Lopez-Sanchez, Jon Loveday, Peder NorbergSteven Phillipps, Cristina C. Popescu, Matthew Prescott, Anne E. Sansom, Richard J. Tuffs

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)
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Abstract

We present an estimate of the galaxy stellar mass function and its division by morphological type in the local (0.025 < z < 0.06) Universe. Adopting robust morphological classifications as previously presented (Kelvin et al.) for a sample of 3727 galaxies taken from the Galaxy And Mass Assembly survey, we define a local volume and stellar mass limited sub-sample of 2711 galaxies to a lower stellar mass limit of M = 109.0 MΘ. We confirm that the galaxy stellar mass function is well described by a double-Schechter function given by Μ* = 1010.64 MΘ, α1 = 0.43, φ1* = 4.18 dex-1 Mpc-3, α2 = −1.50 and φ2* = 0.74 dex-1 Mpc-3. The constituent morphological-type stellar mass functions are well sampled above our lower stellar mass limit, excepting the faint little blue spheroid population of galaxies. We find approximately 71-4+3 per cent of the stellar mass in the local Universe is found within spheroid-dominated galaxies; ellipticals and S0-Sas. The remaining 29-3+4 per cent falls predominantly within late-type disc-dominated systems, Sab-Scds and Sd-Irrs. Adopting reasonable bulge-to-total ratios implies that approximately half the stellar mass today resides in spheroidal structures, and half in disc structures. Within this local sample, we find approximate stellar mass proportions for E : S0-Sa : Sab-Scd : Sd-Irr of 34 : 37 : 24 :5.

Original languageEnglish
Pages (from-to)1647-1659
Number of pages13
JournalMonthly Notices of the Royal Astronomical Society
Volume444
Issue number2
Early online date30 Aug 2014
DOIs
Publication statusPublished - 21 Oct 2014

Keywords

  • Galaxies: elliptical and lenticular
  • cD galaxies: fundamental parameters
  • Galaxies: luminosity function
  • Mass function
  • Galaxies: spiral
  • Digital sky survey
  • Star-forming galaxies
  • Dark-matter Haloes
  • Elliptic galaxies
  • Atlas(3D) project
  • Morphological class
  • Structural decomposition
  • Luminosity functions
  • Kinematic properties
  • Metallicity relation

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