Special Universe Talk: Combining Probes of Large-Scale Structure in the Precision Cosmology Era

by Elisabeth Krause (Stanford Univ.)

Monday 15 Jun 2015, 14:00 → 15:00 Europe/Berlin

seminar room (Excellence Cluster Universe, Boltzmannstrasse 2, Garching)

Current and upcoming wide-field large-scale structure surveys will enable precision measurements of various observables of large-scale structure, such as weak lensing, galaxy clustering, and the abundance of galaxy clusters. These observables probe different aspects of cosmic structure formation, and combining them improves constraints on cosmology significantly. However, these observables probe the same underlying density field, and the information content is correlated. Additionally, they share correlated (astrophysical and observational) systematic effects. In this talk Elisabeth will introduce the analysis concepts required for the joint analysis of probes of large-scale structure. She will discuss cross-correlations of observables, and modeling and mitigation of systematic uncertainties affecting multiple probes. As an example for the preparatory science required to maximize the return from future, systematics limited surveys, Elisabeth will present a quantitative comparison of different weak lensing systematics.