Structure Formation with Scalar Field Dark Matter: The Fluid Approach

TL;DR

This paper develops a hydrodynamical model for early universe structure formation assuming dark matter is a scalar field, aiming to better explain galaxy formation compared to cold dark matter models.

Contribution

It introduces a fluid approach to simulate scalar field dark matter, providing a new method to study large-scale structure formation in the universe.

Findings

Hydrodynamical simulations of scalar field dark matter show distinct structure formation patterns.

The scalar field potential influences the distribution and evolution of matter in the early universe.

Results suggest scalar field dark matter could better match observed galaxy properties.

Abstract

The properties of nearby galaxies that can be observed in great detail suggest that a better theory rather than cold dark matter (CDM) would describe in a better way a mechanism by which matter is more rapidly gathered into large-scale structure such as galaxies and groups of galaxies. In this work we develop and simulate a hydrodynamical approach for the early formation of structure in the Universe, this approach is based on the fact that dark matter is on the form of some kind of scalar field (SF) with a potential that goes as $\mu^2\Phi^2/2+\lambda\Phi^4/4$, we expect that the fluctuations coming from the SF will give us some information about the matter distribution we observe these days.