Cosmological constraints on the Multi Scalar Field Dark Matter model

Abstract

The main aim of this paper is to provide cosmological constraints on the Multi Scalar Field Dark Matter model (MSFDM), in which we assume the dark matter is made up of different ultra-light scalar fields. As a first approximation, we consider they are real and do not interact with each other. We study the equations for both the background and perturbations for $N$-fields and present the evolution of the density parameters, the mass power spectrum and the CMB spectrum. In particular, we focus on two scalar fields with several combinations for the potentials $V(\varphi )=1/2m_{\varphi }^2{\varphi }^2$, $V(\varphi )=m_{\varphi }^2{f}^2\left[1+\cos (\varphi /f)\right]$ and $V(\varphi )=m_{\varphi }^2{f}^2\left[\cosh (\varphi /f)-1\right]$, however the work, along with the code, could be easily extended to more fields. We use the data from BAO, Big Bang Nucleosynthesis, Lyman-$\alpha$ forest and Supernovae to find constraints on the sampling parameters for the cases of a single field and double field, along with the Bayesian evidence. We found that some combinations of the potentials get penalized through the evidence, however for others there is a preference as good as for the cold dark matter.

22 pages, 21 Figures; matches the version published in Physical Review D

References in corpus (16)

• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Ultralight scalars as cosmological dark matter
• Bayes in the sky: Bayesian inference and model selection in cosmology
• Massive neutrinos and cosmology
• A common mass scale for satellite galaxies of the Milky Way
• A search for ultra-light axions using precision cosmological data
• Measuring the effective complexity of cosmological models
• First star-forming structures in fuzzy cosmic filaments
• ${\varphi }^2$ as Dark Matter
• Two scalar field cosmology: Conservation laws and exact solutions
• Cosmological evolution of a complex scalar field with repulsive or attractive self-interaction
• Fuzzy Dark Matter Candidates from String Theory
• Two-scalar-field model for the interaction of dark energy and dark matter
• Accurate effective fluid approximation for ultralight axions
• Gravitational lensing $H_0$ tension from ultralight axion galactic cores
• Scalar field dark matter with a cosh potential, revisited

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