Speaker
Yanchuan Cai
(Institute for Astronomy, University of Edinburgh)
Description
On large scales, peculiar velocities encode rich cosmological information. While the line-of-sight components are routinely analysed e.g., through redshift-space distortions and the kinetic Sunyaev-Zel’dovich effect, measurement of transverse velocities remains challenging. I will present a detection of gravitational dipoles aligned with transverse velocities, traced through their imprints on the Cosmic Microwave Background, using galaxy samples from SDSS-BOSS and maps of the CMB from Planck.
Reference: https://arxiv.org/pdf/2504.02525
Primary author
Yanchuan Cai
(Institute for Astronomy, University of Edinburgh)
