Question

Cosmological fluctuations: what is gaussian?

Answer 1

Non-Gaussianity. Most inflationary models of the early Universe predict that the initial density fluctuations in the Universe giving rise to the temperature-fluctuations in the Cosmic Microwave Background (CMB) and in the Large Scale Structure (LSS) are nearly Gaussian distributed.

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Answer 2

It means , that the cosmological perturbations satisfy Gaussian initial conditions . This means , the probability of the perturbation amplitude has the Gaussian shape about the meanwhile ... It means that there is e.g washout of the perturbations .

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