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Galaxy And Mass Assembly (GAMA) : ugrizYJHK Sersic luminosity functions and the cosmic spectral energy distribution by Hubble type

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Date
01/04/2014
Author
Kelvin, Lee S.
Driver, Simon P.
Robotham, Aaron S. G.
Graham, Alister W.
Phillipps, Steven
Agius, Nicola K.
Alpaslan, Mehmet
Baldry, Ivan
Bamford, Steven P.
Bland-Hawthorn, Joss
Brough, Sarah
Brown, Michael J. I.
Colless, Matthew
Conselice, Christopher J.
Hopkins, Andrew M.
Liske, Jochen
Loveday, Jon
Norberg, Peder
Pimbblet, Kevin A.
Popescu, Cristina C.
Prescott, Matthew
Taylor, Edward N.
Tuffs, Richard J.
Keywords
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Galaxies: luminosity function, mass function
Galaxies: spiral
Digital-sky-survey
Star-formation rate
Stellar mass
Elliptical galaxies
Classification systems
Spiral galaxies
Virgo cluster
Data release
Morphological classifications
Dwarf galaxies
QB Astronomy
QC Physics
Metadata
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Abstract
We report the morphological classification of 3727 galaxies from the Galaxy and Mass Assembly survey with Mr < −17.4 mag and in the redshift range 0.025 < z < 0.06 (2.1 × 105 Mpc3) into E, S0-Sa, SB0-SBa, Sab-Scd, SBab-SBcd, Sd-Irr and little blue spheroid classes. Approximately 70 per cent of galaxies in our sample are disc-dominated systems, with the remaining similar to ~30 per cent spheroid dominated. We establish the robustness of our classifications, and use them to derive morphological-type luminosity functions and luminosity densities in the ugrizYJHK passbands, improving on prior studies that split by global colour or light profile shape alone. We find that the total galaxy luminosity function is best described by a double-Schechter function while the constituent morphological-type luminosity functions are well described by a single-Schechter function. These data are also used to derive the star formation rate densities for each Hubble class, and the attenuated and unattenuated (corrected for dust) cosmic spectral energy distributions, i.e. the instantaneous energy production budget. While the observed optical/near-IR energy budget is dominated 58:42 by galaxies with a significant spheroidal component, the actual energy production rate is reversed, i.e. the combined disc-dominated populations generate similar to ~1.3 times as much energy as the spheroid-dominated populations. On the grandest scale, this implies that chemical evolution in the local Universe is currently largely confined to mid-type spiral classes like our Milky Way.
Citation
Kelvin , L S , Driver , S P , Robotham , A S G , Graham , A W , Phillipps , S , Agius , N K , Alpaslan , M , Baldry , I , Bamford , S P , Bland-Hawthorn , J , Brough , S , Brown , M J I , Colless , M , Conselice , C J , Hopkins , A M , Liske , J , Loveday , J , Norberg , P , Pimbblet , K A , Popescu , C C , Prescott , M , Taylor , E N & Tuffs , R J 2014 , ' Galaxy And Mass Assembly (GAMA) : ugrizYJHK Sersic luminosity functions and the cosmic spectral energy distribution by Hubble type ' , Monthly Notices of the Royal Astronomical Society , vol. 439 , no. 2 , pp. 1245-1269 . https://doi.org/10.1093/mnras/stt2391
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/stt2391
ISSN
0035-8711
Type
Journal article
Rights
© 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5386

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