Speaker
Description
Anomalous Microwave Emission (AME) is a poorly understood Galactic foreground that becomes increasingly relevant for the precision targeted by next-generation CMB experiments, particularly in polarisation where current observations only place sub-percent upper limits on its polarisation fraction. LiteBIRD, with its broad frequency coverage and high sensitivity, offers a unique opportunity to characterise AME in both intensity and polarisation. In this talk I present forecasts of LiteBIRD's ability to detect the AME signal using a template-fitting approach based on cross-correlations between LiteBIRD frequency maps and spatial templates. We find that the recovered amplitude is significantly biased by leakage between spatially correlated foreground components — synchrotron, thermal dust, and AME itself — and I discuss the mitigation strategies under development to recover an unbiased estimate of LiteBIRD's intrinsic sensitivity to AME. I will conclude by outlining how this work will be extended through the inclusion of complementary low-frequency data from ground-based experiments such as QUIJOTE and C-BASS, which is essential to break degeneracies between correlated foregrounds