Constraints on cosmology beyond $\hat{I}›$CDM with kinetic Sunyaev Zel'dovich velocity reconstruction

Abstract

Kinetic Sunyaev Zel'dovich velocity reconstruction uses the statistically anisotropic cross-correlation between cosmic microwave background (CMB) temperature anisotropies and a galaxy survey to reconstruct the remotely observed CMB dipole. Using a reconstruction based on data from $\text{Planck}$ and unWISE, we rule out non-linear Gpc-scale voids, provide the tightest constraint on the intrinsic dipole ($<14km/s$ at $68\%$ confidence), rule out matter-radiation isocurvature as an explanation of discrepancies between the measured CMB and galaxy number count dipoles, and constrain the amplitude of local-type primordial non-Gaussianity ($-220\lesssim f_{\mathrm{NL}}\lesssim 136$ at $68\%$ confidence) and compensated isocurvature ($-147\lesssim A_{\mathrm{CIP}}\lesssim 281$ at $68\%$ confidence). This representative set of constraints on beyond-$\hat{I}›$CDM scenarios demonstrates the breadth of fundamental science possible with measurements of secondary CMB anisotropies such as the kinetic Sunyaev Zel'dovich effect.

All comments are welcome, 5+13 pages, 2+6 figures