PIRSA:21050016

Improved constraint on primordial gravitational waves with delensing

APA

Wu, K. (2021). Improved constraint on primordial gravitational waves with delensing . Perimeter Institute. https://pirsa.org/21050016

MLA

Wu, Kimmy. Improved constraint on primordial gravitational waves with delensing . Perimeter Institute, May. 11, 2021, https://pirsa.org/21050016

BibTex

          @misc{ pirsa_21050016,
            doi = {},
            url = {https://pirsa.org/21050016},
            author = {Wu, Kimmy},
            keywords = {Cosmology},
            language = {en},
            title = {Improved constraint on primordial gravitational waves with delensing },
            publisher = {Perimeter Institute},
            year = {2021},
            month = {may},
            note = {PIRSA:21050016 see, \url{https://pirsa.org}}
          }
          

Abstract

Inflation generically predicts a background of primordial gravitational waves, which generate a primordial B-mode component in the polarization of the cosmic microwave background (CMB). The measurement of such a B-mode signature would lend significant support to the paradigm of inflation. Observed B modes also contain a component from the gravitational lensing of primordial E modes, which can obscure the measurement of the primordial B modes. We reduce the sample variance in the BB spectrum contributed from this lensing component by a process called 'delensing.' In this talk, I will show results from the first demonstration in an improved constraint on primordial gravitational waves with delensing using data from BICEP/Keck, the South Pole Telescope (SPT), and Planck. In addition, I will provide an outlook of joint-analysis efforts of the BICEP/Keck and the SPT collaborations (the South Pole Observatory) to constrain primordial gravitational waves.