Fingerprints of Anomalous Primordial Universe on the Abundance of Large Scale Structures

Understand

We study the predictions of anomalous inflationary models on the abundance of structures in large scale structure observations.

• The anomalous features encoded in primordial curvature perturbation power spectrum are (a): localized feature in momentum space, (b): hemispherical asymmetry and (c): statistical anisotropies.
• We present a model-independent expression relating the number density of structures to the changes in the matter density variance.
• Models with localized feature can alleviate the tension between observations and numerical simulations of cold dark matter structures on galactic scales as a possible solution to the missing satellite problem.