Wavelet analysis of non-Gaussian anisotropies from primordial voids in simulated maps of the Cosmic Microwave Background

TL;DR

This paper investigates the potential of wavelet analysis to detect non-Gaussian anisotropies caused by primordial voids in simulated CMB maps, aiming to identify signatures of early universe phase transitions.

Contribution

It introduces a wavelet-based method to analyze non-Gaussian features in CMB maps resulting from primordial bubbles during inflation.

Findings

Wavelet analysis can effectively identify signatures of primordial voids.

The method shows promise for application to Planck mission data.

Detectability depends on void size and distribution.

Abstract

Phase transitions taking place during the inflationary epoch give rise to bubbles of true vacuum embedded in the false vacuum. These bubbles can imprint a distinctive signal on the Cosmic Microwave Background (CMB). We evaluate the feasibility of detecting these signatures with waveletsin CMB maps, such as those that will be made available by the European Space Agency's (ESA) Planck mission.