PIRSA:10040042 Scientific Series Cosmology

DOI10.48660/10040042

Series: Colloquium

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}}
}

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.

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