A Novel Bispectrum Extracting the Kinematic SZ Effect as a Cosmological Probe

This informal astronomy talk explores a novel bispectrum method for extracting the kinematic Sunyaev-Zel'dovich (kSZ) effect as a cosmological probe. Presented by Raagini Patki from Cornell University, the 30-minute presentation begins with a brief review of the kSZ effect before delving into recent research proposing a temperature-temperature-density bispectrum approach for extracting kSZ signals from cleaned CMB maps. Learn how this innovative estimator can utilize any tracer of large-scale structure density fields without requiring individual redshifts. Discover the forecasted high signal-to-noise ratios of approximately 100 for upcoming projects like the Simons Observatory and CMB-S4 when correlated with galaxy samples from WISE restricted to the linear regime. Explore how the signal-to-noise ratio peaks for specific triangle configurations in harmonic space, the cosmological dependence of the kSZ signal, and potential constraints on neutrino masses. The talk concludes by discussing the advantages of this estimator and its prospects as a novel probe of baryonic abundance and beyond-ΛCDM cosmology with future precision measurements.