The distribution of primordial density perturbations is a key discriminant between different models for the origin of structure in the very early universe. Galaxies are biased tracers of this underlying matter distribution, and deviations from a simple Gaussian distribution can give rise to scale-dependent bias on the largest observable scales. Studying very large scales, close to the Hubble-horizon, requires a consistent relativistic interpretation, but standard treatments (and numerical simulations) are based on Newtonian gravity. I will show how Einstein's general relativity gives rise to a characteristic non-Gaussian signature in the primordial distribution of matter and hence galaxies on large scales. - G. O. Jones 516

Series:

The London Relativity and Cosmology Seminar

Speaker:

David Wands (Portsmouth)

Date:

February 25th, 2015 at 16:30

Room:

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Abstract: