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Open Access Publications from the University of California

Constraining Cosmological Models Using Non-Gaussian Perturbations in the Cosmic Microwave Background

  • Author(s): O'Bryan, Jon
  • Advisor(s): Cooray, Asantha
  • et al.

We study non-Gaussian distributions in temperature fluctuations of the cosmic microwave

background radiation. We introduce a novel way of measuring spatial variations in the

fine-structure constant with these tools. We also lay out the method of measuring the first

non-Gaussian moment using the three-point correlation function and an optimized estimator

and apply these methods to the Planck CMB maps.

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