Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Galaxy And Mass Assembly (GAMA): Structural Investigation of Galaxies via Model Analysis
Monthly Notices of the Royal Astronomical Society, Volume 421, No. 2, Year 2012
Notification
URL copied to clipboard!
Description
We present single-Sérsic two-dimensional (2D) model fits to 167600 galaxies modelled independently in the ugrizYJHK bandpasses using reprocessed Sloan Digital Sky Survey Data Release Seven (SDSS DR7) and UKIRT Infrared Deep Sky Survey Large Area Survey imaging data available from the Galaxy And Mass Assembly (GAMA) data base. In order to facilitate this study we developed Structural Investigation of Galaxies via Model Analysis (sigma), an r wrapper around several contemporary astronomy software packages including source extractor, psf extractor and galfit 3. sigma produces realistic 2D model fits to galaxies, employing automatic adaptive background subtraction and empirical point spread function measurements on the fly for each galaxy in GAMA. Using these results, we define a common coverage area across the three GAMA regions containing 138269 galaxies. We provide Sérsic magnitudes truncated at 10r e which show good agreement with SDSS Petrosian and GAMA photometry for low Sérsic index systems (n < 4), and much improved photometry for high Sérsic index systems (n > 4), recovering as much as Δm= 0.5mag in the r band. We employ a K-band Sérsic index/u-r colour relation to delineate the massive (n > ~2) early-type galaxies (ETGs) from the late-type galaxies (LTGs). The mean Sérsic index of these ETGs shows a smooth variation with wavelength, increasing by 30 per cent from g through K. LTGs exhibit a more extreme change in Sérsic index, increasing by 52 per cent across the same range. In addition, ETGs and LTGs exhibit a 38 and 25 per cent decrease, respectively, in half-light radius from g through K. These trends are shown to arise due to the effects of dust attenuation and stellar population/metallicity gradients within galaxy populations. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Authors & Co-Authors
Kelvin, Lee S.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
International Centre for Radio Astronomy Research
Driver, Simon P.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
International Centre for Radio Astronomy Research
Robotham, Aaron S.G.
United Kingdom, St Andrews
University of st Andrews
Australia, Perth
International Centre for Radio Astronomy Research
Hill, David T.
United Kingdom, St Andrews
University of st Andrews
Alpaslan, Mehmet
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
Bland-Hawthorn, Joss
Australia, Sydney
The University of Sydney
Brough, Sarah
Australia
Australian Astronomical Observatory
Graham, Alister W.
Australia, Hawthorn
Swinburne University of Technology
Häussler, Boris
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
Norberg, Peder R.
United Kingdom, Durham
Durham 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
Taylor, Edward N.
Australia, Sydney
The University of Sydney
Australia, Melbourne
University of Melbourne
Tuffs, Richard J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Statistics
Citations: 268
Authors: 20
Affiliations: 14
Identifiers
Doi:
10.1111/j.1365-2966.2012.20355.x
ISSN:
13652966
Research Areas
Health System And Policy
Study Design
Cross Sectional Study
Study Approach
Quantitative