PIRSA:25070023

A CMB view of DESI galaxies

Ferraro, S. (2025). A CMB view of DESI galaxies. Perimeter Institute. https://pirsa.org/25070023

Ferraro, Simone. A CMB view of DESI galaxies. Perimeter Institute, Jul. 29, 2025, https://pirsa.org/25070023 

          @misc{ pirsa_PIRSA:25070023,
            doi = {10.48660/25070023},
            url = {https://pirsa.org/25070023},
            author = {Ferraro, Simone},
            keywords = {Cosmology},
            language = {en},
            title = {A CMB view of DESI galaxies},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {jul},
            note = {PIRSA:25070023 see, \url{https://pirsa.org}}
          }

Simone Ferraro Lawrence Berkeley National Laboratory

Talk numberPIRSA:25070023
DOI10.48660/25070023
Collection
Talk Type Conference
Subject

Abstract

Information about the late-time Universe is imprinted on the small-scale CMB as photons travel to us from the surface of last scattering. Several processes are at play and small-scale fluctuations are very rich and non-Gaussian in nature. I will review some recent and exciting results that use the Sunyaev-Zel'dovich (SZ) effects and gravitational lensing to paint a full picture of the visible and dark matter in and around DESI galaxies. I will discuss how a combination of measurements can probe velocity fields at cosmological distances and inform us on galaxy energetics. I will also show recent measurements of weak lensing of the CMB and its cross-correlation with DESI, and how they can help us interpret intriguing discrepancies in cosmological parameters between the high and low redshift Universe.