Andrina Nicola (Hosted by Krawczynski) from Princeton University will be presenting this physics colloquium.
Recent progress in observational cosmology and the establishment of ΛCDM have relied on the combination of different cosmological probes. These probes are not independent, since they all measure the same physical fields. The resulting cross-correlations allow for a robust test of the cosmological model through the consistency of different physical tracers and for the identification of systematics. Integrated analyses taking into account both the auto- as well as the cross-correlations between probes therefore present a promising analysis method for both current as well as future data.
Observational cosmology is currently undergoing transformational changes, as a number of high-precision, wide-field surveys will start operations in the mid- to late 2020s; examples include Rubin/LSST, Euclid, Roman and the Simons Observatory. These surveys will give us the opportunity to test the foundations of our cosmological model. However, the increase in survey sensitivity implies that controlling systematic biases and uncertainties will become the main challenge in their analysis, therefore requiring novel data analysis methods.
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