PIRSA:20090014

CMB lensing and new constraints on the early universe

APA

Sherwin, B. (2020). CMB lensing and new constraints on the early universe. Perimeter Institute. https://pirsa.org/20090014

MLA

Sherwin, Blake. CMB lensing and new constraints on the early universe. Perimeter Institute, Sep. 15, 2020, https://pirsa.org/20090014

BibTex

          @misc{ pirsa_20090014,
            doi = {},
            url = {https://pirsa.org/20090014},
            author = {Sherwin, Blake},
            keywords = {Cosmology},
            language = {en},
            title = {CMB lensing and new constraints on the early universe},
            publisher = {Perimeter Institute},
            year = {2020},
            month = {sep},
            note = {PIRSA:20090014 see, \url{https://pirsa.org}}
          }
          

Abstract

Measurements of gravitational lensing in the cosmic microwave background (CMB) allow the dark matter distribution to be mapped out to uniquely high redshifts. After giving a brief overview of current and upcoming CMB lensing measurements, I will focus on two new ways of using CMB lensing, in combination with galaxy surveys, to constrain the early universe. First, I will explore how CMB lensing and galaxy surveys could provide insights into current discrepancies in measurements of the Hubble constant. Second, I will explain why new approaches to de-lensing – removing the lensing effect to reveal the primordial polarization sky – will be important for probing the early universe with the Simons Observatory CMB experiment.