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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Galaxy and Mass Assembly (GAMA): The GAMA galaxy group catalogue (G3Cv1)
Monthly Notices of the Royal Astronomical Society, Volume 416, No. 4, Year 2011
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Description
Using the complete Galaxy and Mass Assembly I (GAMA-I) survey covering ∼142deg2 torAB= 19.4, of which ∼47deg2 is torAB= 19.8, we create the GAMA-I galaxy group catalogue (G3Cv1), generated using a friends-of-friends (FoF) based grouping algorithm. Our algorithm has been tested extensively on one family of mock GAMA lightcones, constructed from Λ cold dark matterN-body simulations populated with semi-analytic galaxies. Recovered group properties are robust to the effects of interlopers and are median unbiased in the most important respects. G3Cv1 contains 14388 galaxy groups (with multiplicity ≥2), including 44186 galaxies out of a possible 110192 galaxies, implying ∼40 per cent of all galaxies are assigned to a group. The similarities of the mock group catalogues and G3Cv1 are multiple: global characteristics are in general well recovered. However, we do find a noticeable deficit in the number of high multiplicity groups in GAMA compared to the mocks. Additionally, despite exceptionally good local spatial completeness, G3Cv1 contains significantly fewer compact groups with five or more members, this effect becoming most evident for high multiplicity systems. These two differences are most likely due to limitations in the physics included of the current GAMA lightcone mock. Further studies using a variety of galaxy formation models are required to confirm their exact origin. The G3Cv1 catalogue will be made publicly available as and when the relevant GAMA redshifts are made available at © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Authors & Co-Authors
Robotham, Aaron S.G.
United Kingdom, St Andrews
University of st Andrews
Norberg, Peder R.
United Kingdom, Edinburgh
The University of Edinburgh
Driver, Simon P.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
International Centre for Radio Astronomy Research
Baldry, Ivan K.
United Kingdom, Liverpool
Liverpool John Moores University
Bamford, Steven P.
United Kingdom, Nottingham
University of Nottingham
Hopkins, Andrew M.
Australia
Australian Astronomical Observatory
Liske, Jochen
Germany, Garching Bei Munchen
European Southern Observatory
Loveday, Jon N.
United Kingdom, Brighton
University of Sussex
Merson, Alexander I.
United Kingdom, Durham
Durham University
Peacock, John A.
United Kingdom, Edinburgh
The University of Edinburgh
Brough, Sarah
Australia
Australian Astronomical Observatory
Cameron, Ewan
Switzerland, Zurich
Eth Zürich
Conselice, Christopher J.
United Kingdom, Nottingham
University of Nottingham
Croom, Scott M.
Australia, Sydney
The University of Sydney
Frenk, Carlos S.
United Kingdom, Durham
Durham University
Gunawardhana, Madusha L.P.
Australia, Sydney
The University of Sydney
Hill, David T.
United Kingdom, St Andrews
University of st Andrews
Jones, Daniel Heath
Australia, Clayton
Monash University
Kelvin, Lee S.
United Kingdom, St Andrews
University of st Andrews
Kuijken, Konrad H.
Netherlands, Leiden
Universiteit Leiden
Nichol, Robert C.
United Kingdom, Portsmouth
University of Portsmouth
Parkinson, Hannah R.
United Kingdom, Edinburgh
The University of Edinburgh
Pimbblet, Kevin A.
Australia, Clayton
Monash University
Phillipps, Steven
United Kingdom, Bristol
University of Bristol
Popescu, Cristina C.
United Kingdom, Preston
University of Central Lancashire
Prescott, Matthew
United Kingdom, Liverpool
Liverpool John Moores University
Sharp, Rob G.
Australia, Canberra
Australian National University, Mount Stromlo Observatory
Sutherland, William J.
United Kingdom, London
Queen Mary University of London
Taylor, Edward N.
Australia, Sydney
The University of Sydney
Thomas, Daniel B.
United Kingdom, Portsmouth
University of Portsmouth
Tuffs, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
van Kampen, Eelco V.
Germany, Garching Bei Munchen
European Southern Observatory
Wijesinghe, Dinuka B.
Australia, Sydney
The University of Sydney
Statistics
Citations: 282
Authors: 33
Affiliations: 19
Identifiers
Doi:
10.1111/j.1365-2966.2011.19217.x
ISSN:
00358711
Study Design
Cross Sectional Study
Study Approach
Quantitative