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-López, Jochen Liske, Ángel R. López-Sánchez, Jon Loveday, Peder Norberg & 5 others Steven Phillipps, Cristina C. Popescu, Matthew Prescott, Anne E. Sansom, Richard J. Tuffs

*Corresponding author for this work

Research output: Contribution to journalArticle

65 Citations (Scopus)

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= 109.0M. We confirm that the galaxy stellar mass function is well described by a double-Schechter function given by M* = 1010.64M α1 = -0.43, ϕ*1 = 4.18 dex-1 Mpc-3, α2 = -1.50 and ϕ*2 = 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+3-4 per cent of the stellar mass in the local Universe is found within spheroid dominated galaxies; ellipticals and S0-Sas. The remaining 29+4-3 per cent falls predominantly within late-type disc-dominated systems, Sab-Scds and Sd-Irrs. Adopting reasonable bulgeto-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
DOIs
Publication statusPublished - 2014

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    Kelvin, L. S., Driver, S. P., Robotham, A. S. G., Taylor, E. N., Graham, A. W., Alpaslan, M., ... Tuffs, R. J. (2014). Galaxy And Mass Assembly (GAMA): Stellar mass functions by Hubble type. Monthly Notices of the Royal Astronomical Society, 444(2), 1647-1659. https://doi.org/10.1093/mnras/stu1507