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Title: Galaxy clustering with Pan-STARRS1 and GAMA
Author: Farrow, Daniel Joseph
ISNI:       0000 0004 2751 2022
Awarding Body: Durham University
Current Institution: Durham University
Date of Award: 2013
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The first theme of this thesis is preparing for the exploitation of a new photometric galaxy survey, Pan STARRS1 (PS1). The second is measuring projected galaxy clustering in the Galaxy and Mass Assembly (GAMA) survey, and using these measurements to constrain models of galaxy formation. The PS1 survey is obtaining imaging in 5 bands (gP1, rP1, iP1, zP1 and yP1) for the 3π steradian survey, the largest optical survey ever conducted. The finished survey will have spatially varying depth, due to the survey strategy. We present a method to correct galaxy number counts and clustering for this based on a simplified signal-to-noise ratio. A star/galaxy separation method calibrated using synthetic images is also presented. By using our techniques on a 69 deg.2 region of science verification data, we show PS1 measurements of the two point angular correlation appear reliable down to rP1 < 22.5. This work lays the foundations for exploiting 3π data for large scale structure. The GAMA survey is a multi-wavelength, spectroscopic survey of galaxies, covering 180 deg.2 . We measure the projected correlation function and its redshift evolution as a function of luminosity, mass and colour. We find redder, more massive and more luminous galaxies are more clustered in three redshift slices over the range 0.0 < z < 0.5. We find that these trends are reproduced in the galaxy formation model of Bower et al. (2006). We also find redder galaxies have steeper correlation functions; a trend which is also reproduced by the model. However, we find that red galaxies in the model are too clustered, particularly on small scales. Our measurements are new constraints on theories of galaxy formation.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available