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Galaxy and mass assembly (GAMA) : projected galaxy clustering.

Farrow, D.J. and Cole, S. and Norberg, P. and Metcalfe, N. and Baldry, I. and Bland-Hawthorn, J. and Brown, M.J.I. and Hopkins, A.M. and Lacey, C.G. and Liske, J. and Loveday, J. and Palamara, D.P. and Robotham, A.S.G. and Sridhar, S. (2015) 'Galaxy and mass assembly (GAMA) : projected galaxy clustering.', Monthly notices of the Royal Astronomical Society., 454 (2). pp. 2120-2145.

Abstract

We measure the projected two-point correlation function of galaxies in the 180 deg2 equatorial regions of the GAMA II survey, for four different redshift slices between z = 0.0 and 0.5. To do this, we further develop the Cole method of producing suitable random catalogues for the calculation of correlation functions. We find that more r-band luminous, more massive and redder galaxies are more clustered. We also find that red galaxies have stronger clustering on scales less than ∼3 h−1 Mpc. We compare to two different versions of the GALFORM galaxy formation model, Lacey et al. (in preparation) and Gonzalez-Perez et al., and find that the models reproduce the trend of stronger clustering for more massive galaxies. However, the models underpredict the clustering of blue galaxies, can incorrectly predict the correlation function on small scales and underpredict the clustering in our sample of galaxies with ∼3L∗r∼3Lr∗. We suggest possible avenues to explore to improve these clustering predictions. The measurements presented in this paper can be used to test other galaxy formation models, and we make the measurements available online to facilitate this.

Item Type:Article
Keywords:Galaxies: evolution, Galaxies: formation, Large-scale structure of Universe.
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1093/mnras/stv2075
Publisher statement:This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2015 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Date accepted:04 September 2015
Date deposited:10 February 2016
Date of first online publication:December 2015
Date first made open access:No date available

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