Constraining cosmological vorticity modes with CMB secondary anisotropies

Understand

Observational searches for large-scale vorticity modes in the late time Universe are underexplored.

• Within the standard $\Lambda$CDM model, this is well motivated given the observed properties of the cosmic microwave background (CMB).
• However, this means that searches for cosmic vorticity modes can serve as a powerful consistency test of our cosmological model.
• We show that through combining CMB measurements of the kinetic Sunyaev-Zel'dovich and the moving lens effects with galaxy survey data we can constrain vorticity fields independently from the large scale cosmic velocity field.