2024/08/09 by Jordan Krywonos, Krywonos, Jordan, Selim C. Hotinli +3 · 4 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.2408.05264
openalex publication_date 2024/08/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 Planck and unWISE, we rule out non-linear Gpc-scale voids, provide the tightest constraint on the intrinsic dipole (<14 \rm km/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\rm NL\lesssim 136 at 68% confidence) and compensated isocurvature (-147\lesssim A\rm CIP \lesssim 281 at 68% confidence). This representative set of constraints on beyond-ΛCDM scenarios demonstrates the breadth of fundamental science possible with measurements of secondary CMB anisotropies such as the kinetic Sunyaev Zel'dovich effect.