Galaxy and mass assembly (GAMA): projected galaxy clustering

Farrow, D.J.; Cole, S.; Norberg, P.; Metcalfe, N.; Baldry, I.; Bland-Hawthorn, J.; Brown, M.J.I.; Hopkins, A.M.; Lacey, C.G.; Liske, J.; Loveday, J.; Palamara, D.P.; Robotham, A.S.G.; Sridhar, S.

doi:10.1093/mnras/stv2075

Galaxy and mass assembly (GAMA): projected galaxy clustering

Farrow, D.J.; Cole, S.; Norberg, P.; Metcalfe, N.; Baldry, I.; Bland-Hawthorn, J.; Brown, M.J.I.; Hopkins, A.M.; Lacey, C.G.; Liske, J.; Loveday, J.; Palamara, D.P.; Robotham, A.S.G.; Sridhar, S.

Authors

D.J. Farrow

Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology

Professor Peder Norberg peder.norberg@durham.ac.uk
Professor

Dr Nigel Metcalfe nigel.metcalfe@durham.ac.uk
Assistant Professor

I. Baldry

J. Bland-Hawthorn

M.J.I. Brown

A.M. Hopkins

Professor Cedric Lacey cedric.lacey@durham.ac.uk
Professor

J. Liske

J. Loveday

D.P. Palamara

A.S.G. Robotham

S. Sridhar

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.

Citation

Farrow, D., Cole, S., Norberg, P., Metcalfe, N., Baldry, I., Bland-Hawthorn, J., …Sridhar, S. (2015). Galaxy and mass assembly (GAMA): projected galaxy clustering. Monthly Notices of the Royal Astronomical Society, 454(2), 2120-2145. https://doi.org/10.1093/mnras/stv2075

Journal Article Type	Article
Acceptance Date	Sep 4, 2015
Publication Date	Dec 1, 2015
Deposit Date	Feb 3, 2016
Publicly Available Date	Feb 10, 2016
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	454
Issue	2
Pages	2120-2145
DOI	https://doi.org/10.1093/mnras/stv2075
Keywords	Galaxies: evolution, Galaxies: formation, Large-scale structure of Universe.

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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.