GAMA is a project to exploit the latest generation of ground-based and space-borne survey facilities to study cosmology and galaxy formation and evolution.
At the heart of this project lies the GAMA spectroscopic survey of ~300,000 galaxies down to r < 19.8 mag over ~286 deg2, carried out using the AAOmega multi-object spectrograph on the Anglo-Australian Telescope (AAT) by the GAMA team. This project was awarded 210 nights over 7 years (2008–2014) and the observations are now completed. This survey builds on, and is augmented by, previous spectroscopic surveys such as the Sloan Digital Sky Survey (SDSS), the 2dF Galaxy Redshift Survey (2dFGRS) and the Millennium Galaxy Catalogue (MGC).
On the imaging side, GAMA uses public data as well as conducting its own campaigns. In addition, the GAMA team has coordinated survey regions and negotiated data sharing agreements with a number of independent imaging survey teams:
|Public surveys:||Sloan Foundation 2.5m||SDSS|
|United Kingdom Infrared Telescope (UKIRT)||UKIDSS-LAS|
|GAMA campaigns:||Galaxy Evolution Explorer (GALEX)||GALEX-GAMA|
|Giant Metrewave Radio Telescope (GMRT)||GMRT-GAMA|
|Surveys connected to GAMA:||VLT Survey Telescope (VST)||KiDS|
|Visible and Infrared Survey Telescope for Astronomy (VISTA)||VIKING|
|Canada France Hawaii Telescope (CFHT)||CFHTLenS|
|Herschel Space Observatory||H-ATLAS|
|The Australian Square Kilometre Array Pathfinder (ASKAP)||DINGO|
|X-ray Multi-Mirror Mission (XMM-Newton)||XMM-XXL|
|Wide field Infra-red Survey Explorer (WISE)|
The main objective of GAMA is to study structure on scales of 1 kpc to 1 Mpc. This includes galaxy clusters, groups, mergers and coarse measurements of galaxy structure (i.e., bulges and discs). It is on these scales where baryons play a critical role in the galaxy formation and subsequent evolutionary processes and where our understanding of structure in the Universe breaks down.
Our primary goal is to test the CDM paradigm of structure formation. In particular, the key scientific objectives are:
To address these goals, GAMA is creating an extraordinary multi-wavelength photometric and spectroscopic dataset with outstanding value to both the large-scale structure and galaxy evolution communities. By virtue of its unrivaled combination of area, spectroscopic depth, high spatial resolution and broad wavelength coverage the GAMA dataset will be uniquely capable of advancing low and intermediate-redshift galaxy studies.
The following table provides an overview of the GAMA survey regions.
|Region||RA range||Dec range||Main survey limit|
|G02||30.2 - 38.8||−10.25 - −3.72||r < 19.8|
|G09||129.0 - 141.0||−2 - +3||r < 19.8|
|G12||174.0 - 186.0||−3 - +2||r < 19.8|
|G15||211.5 - 223.5||−2 - +3||r < 19.8|
|G23||339.0 - 351.0||−35 - −30||i < 19.2|
G02 was somewhat redefined during the course of the survey. As a result only the part north of −6 deg was observed to high completeness.