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Galaxy And Mass Assembly (GAMA) : trends in galaxy colours, morphology, and stellar populations with large-scale structure, group, and pair environments

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Date
11/08/2015
Author
Alpaslan, Mehmet
Driver, Simon
Robotham, Aaron S. G.
Obreschkow, Danail
Andrae, Ellen
Cluver, Michelle
Kelvin, Lee S.
Lange, Rebecca
Owers, Matt
Taylor, Edward N.
Andrews, Stephen K.
Bamford, Steven
Bland-Hawthorn, Joss
Brough, Sarah
Brown, Michael J. I.
Colless, Matthew
Davies, Luke J. M.
Eardley, Elizabeth
Grootes, Meiert W.
Hopkins, Andrew M.
Kennedy, Rebecca
Liske, Jochen
Lara-López, Maritza A.
López-Sánchez, Ángel R.
Loveday, Jon
Madore, Barry F.
Mahajan, Smriti
Meyer, Martin
Moffett, Amanda
Norberg, Peder
Penny, Samantha
Pimbblet, Kevin A.
Popescu, Cristina C.
Seibert, Mark
Tuffs, Richard
Keywords
Galaxies: clusters: general
Galaxies: evolution
Galaxies: luminosity function
Mass function
Galaxies: stellar content
Large-scale structure of Universe
QB Astronomy
QC Physics
NDAS
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Abstract
We explore trends in galaxy properties with Mpc-scale structures using catalogues of environment and large-scale structure from the Galaxy And Mass Assembly (GAMA) survey. Existing GAMA catalogues of large-scale structure, group, and pair membership allow us to construct galaxy stellar mass functions for different environmental types. To avoid simply extracting the known underlying correlations between galaxy properties and stellar mass, we create a mass matched sample of galaxies with stellar masses within 9.5 ≤ log M*/h−2 M⊙ ≤ 11 for each environmental population. Using these samples, we show that mass normalized galaxies in different large-scale environments have similar energy outputs, u − r colours, luminosities, and morphologies. Extending our analysis to group and pair environments, we show that galaxies that are not in groups or pairs exhibit similar characteristics to each other regardless of broader environment. For our mass controlled sample, we fail to see a strong dependence of Sérsic index or galaxy luminosity on halo mass, but do find that it correlates very strongly with colour. Repeating our analysis for galaxies that have not been mass controlled introduces and amplifies trends in the properties of galaxies in pairs, groups, and large-scale structure, indicating that stellar mass is the most important predictor of the galaxy properties we examine, as opposed to environmental classifications.
Citation
Alpaslan , M , Driver , S , Robotham , A S G , Obreschkow , D , Andrae , E , Cluver , M , Kelvin , L S , Lange , R , Owers , M , Taylor , E N , Andrews , S K , Bamford , S , Bland-Hawthorn , J , Brough , S , Brown , M J I , Colless , M , Davies , L J M , Eardley , E , Grootes , M W , Hopkins , A M , Kennedy , R , Liske , J , Lara-López , M A , López-Sánchez , Á R , Loveday , J , Madore , B F , Mahajan , S , Meyer , M , Moffett , A , Norberg , P , Penny , S , Pimbblet , K A , Popescu , C C , Seibert , M & Tuffs , R 2015 , ' Galaxy And Mass Assembly (GAMA) : trends in galaxy colours, morphology, and stellar populations with large-scale structure, group, and pair environments ' , Monthly Notices of the Royal Astronomical Society , vol. 451 , no. 3 , pp. 3249-3268 . https://doi.org/10.1093/mnras/stv1176
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/stv1176
ISSN
0035-8711
Type
Journal article
Rights
© 2015, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stv1176
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/12550

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