SAIFR:4054

Cosmology with gravitational lensing of the Cosmic Microwave Background

(2024). Cosmology with gravitational lensing of the Cosmic Microwave Background. ICTP South American Institute for Fundamental Research. https://scivideos.org/ictp-saifr/4054

Cosmology with gravitational lensing of the Cosmic Microwave Background. ICTP South American Institute for Fundamental Research, Mar. 13, 2024, https://scivideos.org/ictp-saifr/4054 

          @misc{ scivideos_SAIFR:4054,
            doi = {},
            url = {https://scivideos.org/ictp-saifr/4054},
            author = {},
            keywords = {ICTP-SAIFR, IFT, UNESP},
            language = {en},
            title = {Cosmology with gravitational lensing of the Cosmic Microwave Background},
            publisher = { ICTP South American Institute for Fundamental Research},
            year = {2024},
            month = {mar},
            note = {SAIFR:4054 see, \url{https://scivideos.org/ictp-saifr/4054}}
          }
Louis Legrand
Talk numberSAIFR:4054
Source RepositoryICTP – SAIFR
Collection
Talk Type Conference
Subject

Abstract

The Cosmic Microwave Background (CMB) is the most distant light that we can observe today. Since its emission roughly 380.000 years after the Big Bang it crossed all the Universe while coming to us. During their travel, the photons of the CMB have been deflected by the matter they encountered along their path, an effect called gravitational lensing. This deflection of the CMB is a powerful observable, proportional to the integral of the matter distribution up to the early Universe. I will introduce how we can reconstruct this deflection from observations of the CMB. I will then demonstrate how CMB lensing can put tight constraints on the content of the Universe, on the sum of the neutrino masses, and help us discover cosmic inflation. Lastly, I will introduce a new CMB lensing estimator, which will reconstruct optimally the lensing field for the next generation of CMB surveys.