Cosmological perturbations with ultralight vector dark matter fields: numerical implementation in CLASS

Abstract

In this work we consider a dark matter candidate described by an ultralight vector field, whose mass is in principle in the range $H_{\mathrm{eq}}\sim 10^{-28}\mathrm{eV}\ll \mathrm{m}<\mathrm{eV}$. The homogeneous background vector field is assumed to point in a given direction. We present a numerical implementation of cosmological perturbations in a Bianchi type I geometry with vector field dark matter in a modified version of the Cosmic Linear Anisotropy Solving System (CLASS). We study the evolution of large-scale cosmological perturbations in the linear regime. We compute the matter power spectrums defined for Fourier modes pointing in a given direction. We obtain interesting features in the power spectrums whose observational significance depends on the field mass. We compare the results with the standard $\mathrm{\Lambda CDM}$ and with the corresponding well-studied ultralight scalar field dark matter case. As for the scalar case we obtain a suppression in the power spectrums at small scales characterized by the same scale, namely the Jeans scale. The main characteristic feature of the vector field model we notice here for first time is that the amplitude of the suppression effect depends on the direction of the Fourier modes with respect to the background vector field, leaving eventually a possible anisotropic imprint in structure formation at small scales.

19 pages, 9 figures

References in corpus (38)

• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Axion Cosmology
• Ultralight scalars as cosmological dark matter
• WISPy Cold Dark Matter
• A search for ultra-light axions using precision cosmological data
• The Cosmic Linear Anisotropy Solving System (CLASS) IV: Efficient implementation of non-cold relics
• Dark Light, Dark Matter and the Misalignment Mechanism
• Strong bound on canonical ultra-light axion dark matter from the Lyman-alpha forest
• Adiabatic Modes in Cosmology
• Black Hole Superradiance Signatures of Ultralight Vectors
• Black-Hole Bombs and Photon-Mass Bounds
• Pulsar timing signal from ultralight scalar dark matter
• xPert: Computer algebra for metric perturbation theory
• Theory of cosmological perturbations in an anisotropic universe
• Using the Full Power of the Cosmic Microwave Background to Probe Axion Dark Matter
• Ultra-Light Dark Matter Resonates with Binary Pulsars
• Constraints on a Bianchi type I spacetime extension of the standard $\Lambda$CDM model
• Matter power spectrum: from Ly$\alpha$ forest to CMB scales
• xPand: An algorithm for perturbing homogeneous cosmologies
• Probing the Small-Scale Matter Power Spectrum with Large-Scale 21-cm Data
• Cosmology of axion dark matter
• Towards accurate cosmological predictions for rapidly oscillating scalar fields as dark matter
• Oscillating Spin-2 Dark Matter
• Vector Coherent Oscillation Dark Matter
• Isotropy theorem for cosmological vector fields
• A Standard Ruler at Cosmic Dawn
• Non-linear hydrodynamics of axion dark matter: relative velocity effects and "quantum forces"
• Secular effects of Ultralight Dark Matter on Binary Pulsars
• Supersonic Relative Velocity between Dark Matter and Baryons: A Review
• Pulsar timing residual induced by ultralight vector dark matter
• Vector Fuzzy Dark Matter, Fifth Forces, and Binary Pulsars
• Perturbations of ultralight vector field dark matter
• Viable Vector Coherent Oscillation Dark Matter
• Pulsar timing array constraints on spin-2 ULDM
• Binary Pulsars as probes for Spin-2 Ultralight Dark Matter
• Helium-4 Synthesis in an Anisotropic Universe
• Phenomenology of wavelike vector dark matter nonminimally coupled to gravity
• Ultralight vector dark matter, anisotropies and cosmological adiabatic modes

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• Cosmological Gravitational Waves from Ultralight Vector Dark Matter