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

Kelvin, LS, Driver, SP, Robotham, ASG, Taylor, EN, Graham, AW, Alpaslan, M, Baldry, IK, Bamford, SP, Bauer, AE, Bland-Hawthorn, J, Brown, MJI, Colless, M, Conselice, CJ, Holwerda, BW, Hopkins, AM, Lara-Lopez, MA, Liske, J, Lopez-Sanchez, AR, Loveday, J, Norberg, P , Phillipps, S, Popescu, CC, Prescott, M, Sansom, AE and Tuffs, RJ (2014) Galaxy And Mass Assembly (GAMA): stellar mass functions by Hubble type. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 444 (2). pp. 1647-1659. ISSN 0035-8711

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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 3, 727 galaxies taken from the Galaxy And Mass Assembly survey, we define a local volume and stellar mass limited sub-sample of 2, 711 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_, _1 = −0.43, __1 = 4.18 dex−1Mpc−3, _2 = −1.50 and __2 = 0.74 dex−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% of the stellar mass in the local Universe is found within spheroid dominated galaxies; ellipticals and S0-Sas. The remaining 29+4−3% falls predominantly within late type disk 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 disk structures. Within this local sample, we find approximate stellar mass proportions for E : S0 Sa : Sab-Scd : Sd-Irr of 34 : 37 : 24 : 5.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record "Galaxy And Mass Assembly (GAMA): stellar mass functions by Hubble type", MNRAS 444(2), pp.1647-1659 is available online at:http://dx.doi.org/10.1093/mnras/stu1507
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
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Date Deposited: 02 Jul 2015 10:31
Last Modified: 07 Sep 2017 06:02
DOI or Identification number: 10.1093/mnras/stu1507
URI: http://researchonline.ljmu.ac.uk/id/eprint/1509

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