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 accurate modeling of small-scale clustering, specifically the 1-halo term, is crucial for precise redshift-space distortion (RSD) analyses. An interesting solution to this challenge is to reconstruct the halo clustering, which helps mitigate the systematic effects caused by the inclusion of satellite galaxies in clustering analyses. In this work, we explore the cylinder-grouping (CG)...
We construct the velocity field based on a DESI BGS group catalog. We correct RSD with the traditional linear model, and the group catalog is determined from the DESI BGS sample with the updated DESI Y3 spectroscopic data using an extended halo-based method.
The galaxy clustering at north hemisphere is precisely measured by DESI Yr1 survey, to aim better understanding the nature of cosmic acceleration. The credible interpretation of estimated galaxy spectrum is demanded for statistics at smaller scales in which the accurate prediction of higher order perturbation models are required. We advocate the hybrid approach to supplement the incomplete...
We jointly measure the pairwise density-weighted kSZ power spectrum using the CMASS galaxy sample from BOSS DR12 and the temperature map from ACT DR6, and constrain cosmological parameters through joint analysis with the galaxy density power spectrum from CMASS. The constraining power of joint analysis on the growth rate of structure and the two free parameters \alpha_\parallel and...
