PIRSA:10030001 Scientific Series Cosmology

DOI10.48660/10030001

Series: Cosmology and Gravitation

(2010). Probing primordial non-Gaussianity with today's universe. Perimeter Institute. https://pirsa.org/10030001

Probing primordial non-Gaussianity with today's universe. Perimeter Institute, Mar. 02, 2010, https://pirsa.org/10030001 

@misc{ pirsa_PIRSA:10030001,
  doi = {10.48660/10030001},
  url = {https://pirsa.org/10030001},
  author = {},
  keywords = {Cosmology},
  language = {en},
  title = {Probing primordial non-Gaussianity with today{\textquoteright}s universe},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {mar},
  note = {PIRSA:10030001 see, \url{https://pirsa.org}}
}

Abstract

Primordial non-Gaussianity has been traditionaly constrained using three-point function of the cosmic microwave background. Two years ago, however, Dalal et al have shown that non-Gaussianity of the local type induces a scale dependent bias for biased tracers of the underlying dark matter structure. This allows constraining of the primordial non-Gaussianity from measurements of large-scale structure provided by redshift surveys. I will discuss the technique, its theoretical aspects, it surprising resilience towards systematics and current results from the real data. I will also show some preliminary new results: extension to the two field inflationary models and the analogue of the Dalal effect in the Lyman alpha forest.

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