Optimal filters for the moving lens effect

We assess the prospects for detecting the moving lens effect using cosmological surveys. The bulk motion of cosmological structure induces a small-scale dipolar temperature anisotropy of the cosmic microwave radiation, centered around halos and oriented along the transverse velocity field. We introduce a set of optimal filters for this signal and forecast that a high significance detection can be made with upcoming experiments. We discuss the prospects for reconstructing the bulk transverse velocity field on large scales using matched filters, finding good agreement with previous work using quadratic estimators.

Automated summary

The study assesses the potential for detecting the moving lens effect through cosmological surveys, introducing optimal filters for this signal and forecasting a high significance detection with upcoming experiments. It also discusses the prospects for reconstructing the bulk transverse velocity field on large scales using matched filters, showing good agreement with previous work using quadratic estimators.