3:30–4:30 pm ERC 161
Chihway Chang (University of Chicago) "Precision Cosmology with Large-scale Structure in the Era of Galaxy Surveys"
As cosmology has evolved into a precision science in the past two decades, analyses with large datasets from galaxy surveys have become increasingly mature and robust. Some of the big questions have not changed — What is the nature of dark matter? What is dark energy? How can we test models of inflation? But significant progress has been made in understanding the observable universe in the meantime. In this talk I will describe three directions that we have been stress-testing the LCDM paradigm: curating new state-of-the-art data products, robust control of systematic effects combining galaxy and CMB datasets, and developing new analysis techniques using information beyond two-point functions. I will talk about these topics mostly in the context of the Dark Energy Survey (DES) as well as the Rubin Observatory’s Legacy Survey of Space and Time (LSST).
