This work deals with the search for signatures of non-Gaussianities
in the cosmic microwave background (CMB). Probing Gaussianity in
the CMB addresses one of the key questions in modern cosmology
because it allows us to discriminate between different models of
inflation, and thus concerns a fundamental part of the standard
cosmological model. The basic goal here is to adapt complementary
methods stemming from the field of complexity science to CMB data
analysis. Two key concepts, namely the method of surrogates and
estimators for local scaling properties, are applied to CMB data
analysis. All results show strong non-Gaussianities and pronounced
asymmetries. The consistency of the full sky and cut sky results
shows convincingly for the first time that the influence of the
Galactic plane is not responsible for these deviations from
Gaussianity and isotropy. The findings seriously call into question
predictions of isotropic cosmologies based on the widely accepted
single field slow roll inflation model.
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