Speaker
Description
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 \alpha_\perp for the AP test shows significant improvement compared to using galaxy power spectrum analysis alone, with the area of joint posterior distributions reduced by approximately 10% for each pair of parameters. We attempt to investigate the baryon distribution in dark matter halos by comparing the optical depth profiles measured from ACT and CMASS with results from WebSky simulation.
