Physics and Astronomy
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⊙ M=109.0M⊙ . We confirm that the galaxy stellar mass function is well described by a double-Schechter function given by M∗=1010.64M⊙ M∗=1010.64M⊙ , α1 = −0.43, ϕ∗1=4.18dex−1Mpc−3 ϕ1∗=4.18dex−1Mpc−3 , α2 = −1.50 and ϕ∗2=0.74dex−1Mpc−3 ϕ2∗=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 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+4−3 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 Publication Information
This is the accepted version of the following article:
Kelvin, Lee S., et al. "Galaxy And Mass Assembly (GAMA): Stellar Mass Functions by Hubble Type." 2014. Monthly Notices of the Royal Astronomical Society: 1647-1659.
which can be found in final form at https://doi.org/10.1093/mnras/stu1507
Kelvin, Lee S.; Driver, Simon P.; Robotham, Aaron S. G.; Taylor, Edward N.; Graham, Alister W.; Alpaslan, Mehmet; Baldry, Ivan K.; Bamford, Steven P.; Bauer, Amanda E.; Bland-Hawthorn, Joss; Brown, Michael J. I.; Colless, Matthew; Conselice, Christopher J.; Holwerda, Benne W.; Hopkins, Andrew M.; Lara-Lopez, Maritza A.; Liske, Jochen; Lopez-Sanchez, Angel R.; Loveday, Jonathan; Norberg, Peder; Phillipps, Steven; Popescu, Cristina C.; Prescott, Matthew; Sansom, Anne E.; and Tuffs, Richard J., "Galaxy And Mass Assembly (GAMA) : stellar mass functions by Hubble type." (2014). Faculty Scholarship. 199.
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Copyright: 2014. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.