A scalar field dark matter model and its role in the large scale structure formation in the Universe

TL;DR

This paper introduces a scalar field dark matter model within scalar-tensor gravity to study the non-linear evolution of large-scale structures in the universe, providing insights into structure formation consistent with the ΛCDM model.

Contribution

It develops a novel scalar field dark matter model based on scalar-tensor gravity and derives equations for non-linear structure evolution aligned with ΛCDM initial conditions.

Findings

Power spectrum analysis of large-scale structures

Consistent initial conditions with ΛCDM model

Insights into non-linear structure formation processes

Abstract

In this work we present a model of dark matter based on scalar-tensor theory of gravity. With this scalar field dark matter model we study the non-linear evolution of the large scale structures in the universe. The equations that govern the evolution of the scale factor of the universe are derived together with the appropriate Newtonian equations to follow the non-linear evolution of the structures. Results are given in terms of the power spectrum that gives quantitative information on the large-scale structure formation. The initial conditions we have used are consistent with the so called concordance $\Lambda$CDM model.