Description
LiteBIRD (the Lite (Light) spacecraft for the study of B-mode polarization and Inflation from cosmic background Radiation Detection) is a space-based mission dedicated to primordial cosmology. Its objective is to investigate cosmic inflation by targeting primordial B modes in the CMB polarization. Specifically, it will focus on both the reionization and recombination peaks to measure the tensor-to-scalar ratio. To achieve this, LiteBIRD will map the polarization of microwave emissions across the entire sky over a wide frequency range. In this talk, I will introduce the mission and discuss the primary data analysis challenge we must overcome to extract the cosmological information: mitigating Galactic foreground contamination across a large sky fraction. This requires developing novel component separation techniques that can effectively handle the complexity of foreground emissions, their spatial variations in frequency scaling, and the uncertainties in our current knowledge of them. By addressing this challenge, LiteBIRD will also produce state-of-the-art full-sky maps of polarized foreground emissions, particularly thermal dust and synchrotron radiation.
