XIIIth School of Cosmology
November 12 - 18, 2017IESC, Cargèse
The CMB from A to Z
promises and challenges of the CMB as a cosmological probe

 Primordial non-Gaussianity

Physics & Astronomy Dept. G. Galilei, University of Padova


  1.  Non-Gaussianity in the initial conditions
  2. Primordial non-Gaussianity and the CMB
  3. Primordial non-Gaussianity and the LSS of the Universe
  4. Open issues on non-Gaussianity


I will present the physical mechanisms that can generate primordial non-Gaussianity (PNG) during inflation. I'll then discuss the conseqences of PNG in the CMB anisotropy pattern and the statistical estimators used to detect/constrain it.  Aspects of PNG search in the LSS of the Universe will also be discussed. Finally, I'll mention some non-trivial issues on the observability of PNG signatures in CMB/LSS.


  • Articles:
    • P.A.R. Ade et al. [Planck Collaboration],
      ``Planck 2015 results. XVII. Constraints on primordial non-Gaussianity,''
      Astron. Astrophys. 594, A17 (2016)
      arXiv:1502.01592 [astro-ph.CO]
    • N. Bartolo, E. Komatsu, S. Matarrese and A. Riotto,
      ``Non-Gaussianity from inflation: Theory and observations,''
      Phys. Rept. 402, 103 (2004)
    • V. Desjacques, D. Jeong and F. Schmidt,
      ``Large-Scale Galaxy Bias,''
      arXiv:1611.09787 [astro-ph.CO]
    • S. Matarrese and L. Verde,
      ``The effect of primordial non-Gaussianity on halo bias,''
      Astrophys. J. 677, L77 (2008)
      arXiv:0801.4826 [astro-ph]