PIRSA:20090014 Scientific Series Cosmology

DOI10.48660/20090014

Series: Cosmology and Gravitation

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

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

@misc{ pirsa_PIRSA:20090014,
  doi = {10.48660/20090014},
  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.

 

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