Bracketing the soliton-halo relation of ultralight dark matter

Abstract

In theories of ultralight dark matter, solitons form in the inner regions of galactic halos. The observational implications of these depend on the soliton mass. Various relations between the mass of the soliton and properties of the halo have been proposed. We analyze the implications of these relations, and test them with a suite of numerical simulations. The relation of Schive et al. 2014 is equivalent to $(E/M{)}_{\mathrm{sol}}=(E/M{)}_{\mathrm{halo}}$ where $E_{\mathrm{sol}(\mathrm{halo})}$ and $M_{\mathrm{sol}(\mathrm{halo})}$ are the energy and mass of the soliton (halo). If the halo is approximately virialized, this relation is parametrically similar to the evaporation/growth threshold of Chan et al. 2022, and it thus gives a rough lower bound on the soliton mass. A different relation has been proposed by Mocz et al. 2017, which is equivalent to $E_{\mathrm{sol}}=E_{\mathrm{halo}}$, so is an upper bound on the soliton mass provided the halo energy can be estimated reliably. Our simulations provide evidence for this picture, and are in broad consistency with the literature, in particular after accounting for ambiguities in the definition of $E_{\mathrm{halo}}$ at finite volume.

23 pages, matches JCAP version, comments welcome!

References in corpus (32)

• Ultralight scalars as cosmological dark matter
• Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
• Understanding the Core-Halo Relation of Quantum Wave Dark Matter, $\psi$DM, from 3D Simulations
• Wave Dark Matter
• Axion dark matter, solitons, and the cusp-core problem
• Stellar Velocities in the Carina, Fornax, Sculptor and Sextans dSph Galaxies: Data from the Magellan/MMFS Survey
• Lyman-alpha Constraints on Ultralight Scalar Dark Matter: Implications for the Early and Late Universe
• First star-forming structures in fuzzy cosmic filaments
• Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
• Cosmological particle-in-cell simulations with ultralight axion dark matter
• AxioNyx: Simulating Mixed Fuzzy and Cold Dark Matter
• Dark Photon Stars: Formation and Role as Dark Matter Substructure
• Ultra-light dark matter in disk galaxies
• Galactic rotation curves versus ultralight dark matter: A systematic comparison with SPARC data
• Oscillations and Random Walk of the Soliton Core in a Fuzzy Dark Matter Halo
• A lensed radio jet at milli-arcsecond resolution II: Constraints on fuzzy dark matter from an extended gravitational arc
• Scaling relations of Fuzzy Dark Matter haloes I: individual systems in their cosmological environment
• Construction of Wave Dark Matter Halos: Numerical Algorithm and Analytical Constraints
• Quantum fluctuations masquerade as halos: Bounds on ultra-light dark matter from quadruply-imaged quasars
• On the Random Motion of Nuclear Objects in a Fuzzy Dark Matter Halo
• Solitons in the dark: non-linear structure formation with fuzzy dark matter
• Core-halo mass relation of ultralight axion dark matter from merger history
• Deep zoom-in simulation of a fuzzy dark matter galactic halo
• Landau equation for self-gravitating classical and quantum particles: Application to dark matter
• Dwarf galaxies imply dark matter is heavier than $2.2\times 10^{-21}\mathbf{eV}$
• Soliton Formation and the Core-Halo Mass Relation: An Eigenstate Perspective
• Confronting fuzzy dark matter with the rotation curves of nearby dwarf irregular galaxies
• On the Dynamical Heating of Dwarf Galaxies in a Fuzzy Dark Matter Halo
• Gravitational lensing $H_0$ tension from ultralight axion galactic cores
• Relaxation in a Fuzzy Dark Matter Halo. II. Self-consistent kinetic equations
• Quantum Tunneling of Ultralight Dark Matter Out of Satellite Galaxies
• Soliton self-gravity and core-halo relation in fuzzy dark matter halos

Cited by in corpus (5)

• Tidal Suppression of Fuzzy Dark Matter Heating in Milky Way Satellite Galaxies
• Fuzzy dark matter simulations
• Dynamical reconstruction of SPARC galactic halos within self-interacting fuzzy dark matter
• Effects of Self-Interaction and of an Ideal Gas in Binary Mergers of Bosonic Dark Matter Cores
• Self-similar kinetics for gravitational Bose-Einstein condensation