Lectures given at Post-Planck Cosmology, Ecole de Physique des Houches, Les Houches, July 8-Aug 2, 2013, eds. B. Wandelt, C. Deffayet, P. Peter, to be published by Oxford University Press, and New Horizons for Observational Cosmology, International School of Physics Enrico Fermi, Varenna, July 1-6, 2013, eds. A. Melchiorri, A. Cooray, E. Komatsu, to be published by the Italian Society of Physics.
http://arxiv.org/abs/1312.5490

For a PDF version of the article, click here.

LARGE SCALE STRUCTURE OBSERVATIONS

Will J. Percival


Institute of Cosmology and Gravitation, University of Portsmouth,
Dennis Sciama Building, Portsmouth, P01 3FX, UK


Abstract: Galaxy Surveys are enjoying a renaissance thanks to the advent of multi-object spectrographs on ground-based telescopes. The last 15 years have seen the fruits of this experimental advance, including the 2-degree Field Galaxy Redshift Survey (2dFGRS; Colless et al. 2003) and the Sloan Digital Sky Survey (SDSS; York et al. 2000). Most recently, the Baryon Oscillation Spectroscopic Survey (BOSS; Dawson et al. 2013), part of the SDSS-III project (Eisenstein et al. 2011), has provided the largest volume of the low-redshift Universe ever surveyed with a galaxy density useful for high-precision cosmology. This set of lecture notes looks at some of the physical processes that underpin these measurements, the evolution of measurements themselves, and looks ahead to the next 15 years and the advent of surveys such as the enhanced Baryon Oscillation Spectroscopic Survey (eBOSS), the Dark Energy Spectroscopic Instrument (DESI) and the ESA Euclid satellite mission.


Table of Contents

CLUSTERING STATISTICS
The over-density field
The correlation function
The power spectrum
Higher order statistics
Anisotropic statistics

THE COMOVING MATTER POWER SPECTRUM
The matter-radiation equality scale
Neutrino masses
Baryons

PHYSICAL PROCESSES
Linear structure growth
Spherical collapse
Press-Schechter theory
Galaxy bias

GALAXY SURVEY BASICS
Overview of galaxy surveys
Measuring over-densities
Measuring the power spectrum
Measuring the correlation function
Reconstructing the linear density
Ly-a forest surveys

OBSERVATIONAL EFFECTS
Projection and the Alcock-Paczynski effect
Redshift-space distortions
Joint AP and RSD measurements
Primordial non-Gaussianity
Summary

MAKING COSMOLOGICAL-MODEL INFERENCES
Exploring parameter space
Model selection

FUTURE SURVEYS
The next 5 years
5-20 years time
Fisher methods
Predictions for future surveys

REFERENCES

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