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=4.18dex−1Mpc−3, α2 = −1.50 and ϕ∗2=0.74dex−1Mpc−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 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 language | English |
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Pages (from-to) | 1647-1659 |
Number of pages | 13 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 444 |
Issue number | 2 |
DOIs | |
Publication status | Published - 28 Jul 2014 |
Bibliographical note
16 pages, 6 figures, accepted for publication in MNRAS (see MNRAS version for high-quality figures)Keywords
- astro-ph.GA
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Profiles
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Professor Steven Phillipps
- School of Physics - Emeritus Professor
Person: Honorary and Visiting Academic