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Galaxy and Mass Assembly (GAMA): Projected Galaxy Clustering

Farrow, DJ and Cole, S and Norberg, P and Metcalfe, N and Baldry, IK and Bland-Hawthorn, J and Brown, MJI and Hopkins, AM and Lacey, CG and Liske, J and Loveday, J and Palamara, DP and Robotham, ASG and Sridhar, S (2015) Galaxy and Mass Assembly (GAMA): Projected Galaxy Clustering. Monthly Notices of the Royal Astronomical Society, 454 (2). pp. 2120-2145. ISSN 0035-8711

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Abstract

We measure the projected 2-point correlation function of galaxies in the 180 deg$^2$ equatorial regions of the GAMA II survey, for four different redshift slices between z = 0.0 and z=0.5. To do this we further develop the Cole (2011) 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 prep.) and Gonzalez-Perez et al. (2014), and find that the models reproduce the trend of stronger clustering for more massive galaxies. However, the models under predict the clustering of blue galaxies, can incorrectly predict the correlation function on small scales and under predict the clustering in our sample of galaxies with ~3$L_r$ . We suggest possible avenues to explore to improve these cluster- ing 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
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Galaxy and Mass Assembly (GAMA): Projected Galaxy Clustering is available online at: http://dx.doi.org/10.1093/mnras/stv2075
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA; astro-ph.CO
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 15 Sep 2015 10:29
Last Modified: 02 Nov 2015 11:31
DOI or Identification number: 10.1093/mnras/stv2075
URI: http://researchonline.ljmu.ac.uk/id/eprint/2015

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