PIRSA:10040042

Primordial Non-Gaussianity and Large-Scale Structure

Dalal, N. (2010). Primordial Non-Gaussianity and Large-Scale Structure. Perimeter Institute. https://pirsa.org/10040042

Dalal, Neal. Primordial Non-Gaussianity and Large-Scale Structure. Perimeter Institute, Apr. 14, 2010, https://pirsa.org/10040042 

          @misc{ pirsa_PIRSA:10040042,
            doi = {10.48660/10040042},
            url = {https://pirsa.org/10040042},
            author = {Dalal, Neal},
            keywords = {Cosmology},
            language = {en},
            title = {Primordial Non-Gaussianity and Large-Scale Structure},
            publisher = {Perimeter Institute},
            year = {2010},
            month = {apr},
            note = {PIRSA:10040042 see, \url{https://pirsa.org}}
          }

Neal Dalal Perimeter Institute for Theoretical Physics

DOI 10.48660/10040042
Collection
Talk Type Scientific Series
Subject

Abstract

The primordial density fluctuations that seeded large-scale structure are known to be nearly Gaussian, as predicted by most early universe models like slow-roll inflation. Many of these models predict a small (but nonzero!) amount of primordial non-gaussianity, which can subtly affect the statistics of CMB anisotropies. Surprisingly, even a small primordial non-gaussianity can produce enormous changes in the large-scale clustering of galaxies and quasars at late times. I will describe the origin of this effect, and review recent constraints on non-gaussianity using measurements of the clustering of galaxies and quasars in SDSS.