The Case for Axion Dark Matter

Abstract

Dark matter axions form a rethermalizing Bose-Einstein condensate. This provides an opportunity to distinguish axions from other forms of dark matter on observational grounds. I show that if the dark matter is axions, tidal torque theory predicts a specific structure for the phase space distribution of the halos of isolated disk galaxies, such as the Milky Way. This phase space structure is precisely that of the caustic ring model, for which observational support had been found earlier. The other dark matter candidates predict a different phase space structure for galactic halos.

4 pages, no figures

References in corpus (5)

• Bose-Einstein Condensation of Dark Matter Axions
• The Caustic Ring Model of the Milky Way Halo
• Caustics in growing Cold Dark Matter Haloes
• Does the Second Caustic Ring of Dark Matter Cause the Monoceros Ring of Stars ?
• Dark Matter Caustics in Galaxy Clusters

Cited by in corpus (47)

• Experimental Searches for the Axion and Axion-like Particles
• Review of asymmetric dark matter
• Revisiting the bound on axion-photon coupling from Globular Clusters
• A search for ultra-light axions using precision cosmological data
• Invisible Axion Search Methods
• Axion Dark Matter Detection using an LC Circuit
• Bound-state formation for thermal relic dark matter and unitarity
• Unifying of Inflation with Early and Late Dark Energy Epochs in Axion $F(R)$ Gravity
• Cosmic axion thermalization
• Axion Dark Matter Detection using Atomic Transitions
• Geometric Inflation and Dark Energy with Axion $F(R)$ Gravity
• Cosmic Black-Hole Hair Growth and Quasar OJ287
• Updating the MACHO fraction of the Milky Way dark halo with improved mass models
• Coupled Boltzmann calculation of mixed axion/neutralino cold dark matter production in the early universe
• Ultra-light Axions: Degeneracies with Massive Neutrinos and Forecasts for Future Cosmological Observations
• Aspects of Axion $F(R)$ Gravity
• Stringy-Running-Vacuum-Model Inflation: from primordial Gravitational Waves and stiff Axion Matter to Dynamical Dark Energy
• Black hole merger simulations in wave dark matter environments
• Axions and the Galactic Angular Momentum Distribution
• Axion Dark Matter and Cosmological Parameters
• Classicality and Quantum Break-Time for Cosmic Axions
• Growth of accretion driven scalar hair around Kerr black holes
• Effects of the Axion Through the Higgs Portal on Primordial Gravitational Waves During the Electroweak Breaking
• Kinetic Axion $F(R)$ Gravity Inflation
• Cosmological Inhomogeneities with Bose-Einstein Condensate Dark Matter
• Evolution and thermalization of dark matter axions in the condensed regime
• Gravity, entanglement and CPT-symmetry violation in particle mixing
• Effective gravitational interactions of dark matter axions
• Duration of classicality in highly degenerate interacting Bosonic systems
• New astrophysical bounds on ultralight axionlike particles
• Cosmology of Axions and Moduli: A Dynamical Systems Approach
• Gravitational self-interactions of a degenerate quantum scalar field
• Open string axions and the flavor problem
• Testing the Dark Matter Caustic Theory Against Observations in the Milky Way
• Kinetic Axion Dark Matter in String Corrected $f(R)$ Gravity
• $R^2$ Gravity Effects on the Kinetic Axion Phase Space
• Effects of a caustic ring of dark matter on the distribution of stars and interstellar gas
• Probing mixing of photons and axion-like particles by geometric phase
• Testing CPT violation, entanglement and gravitational interactions in particle mixing with trapped ions
• 3D Vortices and rotating solitons in ultralight dark matter
• Dark Matter -- a light move
• The asymmetry and the diurnal variation in axionic dark matter searches
• Stimulated Radiation from Axion Cluster Evolution in Static Spacetimes
• Effects of a dark matter caustic passing through the Oort cloud
• Testing universal dark-matter caustic rings with galactic rotation curves
• CP Asymmetries (\& T Violation) in Known Matter -- and beyond
• The nine rings of the galaxy LEDA 1313424