Rotation curves with the multistate Scalar Field Dark Matter model

TL;DR

This paper investigates axi-symmetric multistate Scalar Field Dark Matter halos in low surface brightness and dwarf disc galaxies, fitting their rotation curves with a two-state model that is favored over standard cold dark matter.

Contribution

It introduces a two-state Scalar Field Dark Matter model to fit galaxy rotation curves, showing it is preferred over the standard DM model based on statistical criteria.

Findings

Two-state Scalar Field Dark Matter fits rotation curves well

Model prefers particle mass rom 10^{-23} to 10^{-24} eV/c^2

Two-state model is favored over DM according to BIC and AIC

Abstract

We use the concept of co-added rotation curves of Salucci et al. to investigate the properties of axi-symmetric multistate Scalar Field Dark Matter halos in low surface brightness galaxies and dwarf disc galaxies. We fit their rotation curves in two-state configurations and we find that all of these can be well fitted with a particle mass $\mu \sim (10^{-23} - 10^{-24})\rm{eV}/c^2$. Comparing our results with the standard cosmological model, the well-known $\Lambda$-cold dark matter, by using the Bayesian information criterion and the Akaike information criterion, we found that our two-state model seemed to be preferred.