A self-consistent wave description of axion miniclusters and their survival in the galaxy

Abstract

We present a solution of the Schrödinger-Poisson system based on the WKB ansatz for the wave function. In this way we obtain a description of a gravitationally bound clump of axion dark matter by a superposition of energy eigenstates with random phases. It can be applied to any self-consistent pair of radial density distribution and phase space density $f(E)$ related by Eddington's formula. We adopt this as a model for axion miniclusters in our galaxy and use it to study the mass loss due to a star encounter by using standard perturbation theory methods known from quantum mechanics. Finally, we perform a Monte Carlo study to estimate the surviving fraction of axion miniclusters in the dark matter halo of our galaxy. We find that the reaction to perturbations and the survival probability depend crucially on the density profile. Weakly bound clusters are heated up and eventually destroyed, whereas more strongly bound systems get even more compact as a result of perturbations and are driven towards an axion star configuration.

arXiv commentMinor changes. Matches published version

References in corpus (61)

• A Universal Density Profile from Hierarchical Clustering
• Axion Cosmology
• Ultralight scalars as cosmological dark matter
• The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
• Cold dark matter haloes in the Planck era: evolution of structural parameters for Einasto and NFW profiles
• Mass models of the Milky Way
• Radioactive 26Al and massive stars in the Galaxy
• alpha-, r-, and s-process element trends in the Galactic thin and thick disks
• Understanding the Core-Halo Relation of Quantum Wave Dark Matter, $\psi$DM, from 3D Simulations
• Mass-radius relation of Newtonian self-gravitating Bose-Einstein condensates with short-range interactions: I. Analytical results
• Extended Search for the Invisible Axion with the Axion Dark Matter Experiment
• Axion Miniclusters and Bose Stars
• Axion Cosmology
• The photometric structure of the inner Galaxy
• The Dark Matter Halo of the Milky Way, AD 2013
• Formation of Solitonic Stars Through Gravitational Cooling
• Gravitational Bose-Einstein condensation in the kinetic regime
• Non-Linear Axion Dynamics and Formation of Cosmological Pseudo-Solitons
• Spiral arms, bar shape and bulge microlensing in the Milky Way
• Femtolensing by Dark Matter Revisited
• Search for "Invisible" Axion Dark Matter in the $3.3\text{-}4.2\mu$eV Mass Range
• Early-Universe Simulations of the Cosmological Axion
• Dilute and dense axion stars
• Early seeds of axion miniclusters
• Revealing the Dark Matter Halo with Axion Direct Detection
• Made-to-Measure models of the Galactic Box/Peanut bulge: stellar and total mass in the bulge region
• Radio Signals from Axion Dark Matter Conversion in Neutron Star Magnetospheres
• Large-amplitude isothermal fluctuations and high-density dark-matter clumps
• Substructure in Dark Halos: Orbital Eccentricities and Dynamical Friction
• Formation and mass growth of axion stars in axion miniclusters
• The distribution of the ISM in the Milky Way A three-dimensional large-scale model
• A new experimental approach to probe QCD axion dark matter in the mass range above 40$\mu$eV
• Structure Formation and Microlensing with Axion Miniclusters
• New insights into the formation and growth of boson stars in dark matter halos
• On the Self-Consistent Response of Stellar Systems to Gravitational Shocks
• Milky Way Kinematics: Measurements at the Subcentral Point of the Fourth Quadrant
• Fast Radio Bursts and Axion Miniclusters
• Astrophysical Effects of Scalar Dark Matter Miniclusters
• Femtolensing and Picolensing by Axion Miniclusters
• Gravitational Lensing Signatures of Axion Dark Matter Minihalos in Highly Magnified Stars
• First Simulations of Axion Minicluster Halos
• Searching for the QCD Axion with Gravitational Microlensing
• Simulations of Axion Minihalos
• Self-consistent construction of virialized wave dark matter halos
• Axion minicluster power spectrum and mass function
• Impact of Dark Matter Microhalos on Signatures for Direct and Indirect Detection
• Tidal streams from axion miniclusters and direct axion searches
• On mini-halo encounters with stars
• If it does not kill them, it makes them stronger: collisional evolution of star clusters with tidal shocks
• Vortices and waves in light dark matter
• Directional axion detection
• Miniclusters in the Axiverse
• Construction of Wave Dark Matter Halos: Numerical Algorithm and Analytical Constraints
• Transient Radio Signatures from Neutron Star Encounters with QCD Axion Miniclusters
• Stellar Disruption of Axion Miniclusters in the Milky Way
• Structure of Axion Miniclusters
• Cosmic Neutrino Background Detection in Large-Neutrino-Mass Cosmologies
• Destruction of axion miniclusters in the Galaxy
• Axion Miniclusters Made Easy
• Evolution of dark matter microhalos through stellar encounters
• Quantum mechanical sum rules for two model systems