Probing the largest cosmological scales with the correlation between the cosmic microwave background and peculiar velocities

摘要: Cross correlation between the cosmic microwave background (CMB) and large-scale structure is a powerful probe of dark energy gravity on largest physical scales. We introduce novel estimator, CMB-velocity correlation, that has most its power large scales that, at low redshift, delivers up to factor 2 higher signal-to-noise ratio than recently detected CMB-dark matter density expected from integrated Sachs-Wolfe effect. propose use combination peculiar velocities measured supernovae type Ia kinetic Sunyaev-Zeldovich cluster surveys reveal this signal forecast constraints can be achieved with future surveys. stress redshift velocity measurements should exploited complementary deeper for precision cosmology.