CONTENT
Large scale galaxy surveys are the main observational tools to advance cosmology during the coming decade. These surveys determine the three-dimensional distribution of galaxies in the universe and, by measuring distortions of galaxy images due to gravitational lensing, map also the distribution of dark matter. From these distributions and their statistical measures, including 2- and 3-point correlation functions, power spectra and bispectra, the large-scale properties of the universe can be determined. One key question is the nature of dark energy, the cause for the accelerated expansion of the universe. It can be probed by measuring accurately the expansion history of the universe and the gravity-driven growth of large-scale structure. These galaxy surveys include the Dark Energy Survey (DES) and the future space missions Euclid and Roman. Finland (Universities of Helsinki, Turku, Jyväskylä, Oulu, and Aalto University) participates in Euclid. The course PAP352 Galaxy Survey Cosmology focuses on the distribution of galaxies and the course PAP353 Gravitational Lensing on gravitational lensing, especially on weak lensing (shear) surveys.
