학술논문
Galaxy And Mass Assembly (GAMA): Data Release 4 and the z < 0.1 total and z < 0.08 morphological galaxy stellar mass functions
Document Type
Working Paper
Author
Driver, Simon P.; Bellstedt, Sabine; Robotham, Aaron S. G.; Baldry, Ivan K.; Davies, Luke J.; Liske, Jochen; Obreschkow, Danail; Taylor, Edward N.; Wright, Angus H.; Alpaslan, Mehmet; Bamford, Steven P.; Bauer, Amanda E.; Bland-Hawthorn, Joss; Bilicki, Maciej; Bravo, Matias; Brough, Sarah; Casura, Sarah; Cluver, Michelle E.; Colless, Matthew; Conselice, Christopher J.; Croom, Scott M.; de Jong, Jelte; D'Eugenio, Franceso; De Propris, Roberto; Dogruel, Burak; Drinkwater, Michael J.; Dvornik, Andrej; Farrow, Daniel J.; Frenk, Carlos S.; Giblin, Benjamin; Graham, Alister W.; Grootes, Meiert W.; Gunawardhana, Madusha L. P.; Hashemizadeh, Abdolhosein; Haussler, Boris; Heymans, Catherine; Hildebrandt, Hendrik; Holwerda, Benne W.; Hopkins, Andrew M.; Jarrett, Tom H.; Jones, D. Heath; Kelvin, Lee S.; Koushan, Soheil; Kuijken, Konrad; Lara-Lopez, Maritza A.; Lange, Rebecca; Lopez-Sanchez, Angel R.; Loveday, Jon; Mahajan, Smriti; Meyer, Martin; Moffett, Amanda J.; Napolitano, Nicola R.; Norberg, Peder; Owers, Matt S.; Radovich, Mario; Raouf, Mojtaba; Peacock, John A.; Phillipps, Steven; Pimbblet, Kevin A.; Popescu, Cristina; Said, Khaled; Sansom, Anne E.; Seibert, Mark; Sutherland, Will J.; Thorne, Jessica E.; Tuffs, Richard J.; Turner, Ryan; van der Wel, Arjen; van Kampen, Eelco; Wilkins, Steve M.
Source
Subject
Language
Abstract
In Galaxy And Mass Assembly Data Release 4 (GAMA DR4), we make available our full spectroscopic redshift sample. This includes 248682 galaxy spectra, and, in combination with earlier surveys, results in 330542 redshifts across five sky regions covering ~250deg^2. The redshift density, is the highest available over such a sustained area, has exceptionally high completeness (95 per cent to r_KIDS=19.65mag), and is well suited for the study of galaxy mergers, galaxy groups, and the low redshift (z<0.25) galaxy population. DR4 includes 32 value-added tables or Data Management Units (DMUs) that provide a number of measured and derived data products including GALEX, ESO KiDS, ESO VIKING, WISE and Herschel Space Observatory imaging. Within this release, we provide visual morphologies for 15330 galaxies to z<0.08, photometric redshift estimates for all 18million objects to r_KIDS~25mag, and stellar velocity dispersions for 111830 galaxies. We conclude by deriving the total galaxy stellar mass function (GSMF) and its sub-division by morphological class (elliptical, compact-bulge and disc, diffuse-bulge and disc, and disc only). This extends our previous measurement of the total GSMF down to 10^6.75 M_sol h^-2_70 and we find a total stellar mass density of rho_*=(2.97+/-0.04)x10^8 M_sol h_70 Mpc^-3 or Omega_*=(2.17+/-0.03)x10^-3 h^-1_70. We conclude that at z<0.1, the Universe has converted 4.9+/-0.1 per cent of the baryonic mass implied by Big Bang Nucleosynthesis into stars that are gravitationally bound within the galaxy population.
Comment: Accepted for publication in MNRAS. GAMA Data Release 4 is available at: http://www.gama-survey.org/dr4/
Comment: Accepted for publication in MNRAS. GAMA Data Release 4 is available at: http://www.gama-survey.org/dr4/