Core and Halo Properties in Multi-Field Wave Dark Matter
arXiv:2310.19762 · doi:10.1088/1475-7516/2024/04/077
Abstract
In this work, we compute multi-field core and halo properties in wave Dark Matter models. We focus on the case where Dark Matter consists of two light (real) scalars, interacting gravitationally. As in the single-field Ultra Light Dark Matter (ULDM) case, the scalar field behaves as a coherent BEC with a definite ground state (at fixed total mass), often referred to in the literature as a gravitational soliton. We establish an efficient algorithm to find the ground and excited states of such two-field systems. We then use simulations to investigate the gravitational collapse and virialization, starting from different initial conditions, into solitons and surrounding halo. As in the single-field case, a virialized halo forms with a gravitational soliton (ground state) at the center. We find some evidence for an empirical relation between the soliton mass and energy and those of the host halo. We use this to then find a numerical relation between the properties of the two. Finally, we use this to address the issue of alleviating some of the tensions that single-field ULDM has with observational data, in particular, the issue of how a galaxy's core and radius are related. We find that if galaxies of different masses have similar percentages of the two species, then the core-radius scaling tension is not addressed. However, more general possibilities occur if the relative abundance of species in each halo correlates with the total mass of the galaxy. If this is the case, the model predicts several other phenomenological signatures.
arXiv comment35 pages, 18 figures. V2: added references. V3: Extended and generalized the analysis of section 4
References in corpus (30)
- String Axiverse
- Cold and Fuzzy Dark Matter
- 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, DM, from 3D Simulations
- Mass-radius relation of Newtonian self-gravitating Bose-Einstein condensates with short-range interactions: I. Analytical results
- First constraints on fuzzy dark matter from Lyman- forest data and hydrodynamical simulations
- Galaxy Formation with BECDM: I. Turbulence and relaxation of idealised haloes
- Constraining the mass of light bosonic dark matter using SDSS Lyman- forest
- Mass-radius relation of Newtonian self-gravitating Bose-Einstein condensates with short-range interactions: II. Numerical results
- Gravitational Bose-Einstein condensation in the kinetic regime
- Dilute and dense axion stars
- Evolution of the Schrödinger--Newton system for a self--gravitating scalar field
- Galactic Rotation Curves vs. Ultra-Light Dark Matter: Implications of the Soliton -- Host Halo Relation
- A comprehensive catalog of dark matter halo models for SPARC galaxies
- Analysis of Dark Matter Axion Clumps with Spherical Symmetry
- Self-consistent construction of virialized wave dark matter halos
- Can Light Dark Matter Solve the Core-Cusp Problem?
- 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
- Evidences against cuspy dark matter halos in large galaxies
- Multifield Ultralight Dark Matter
- Modified gravity models and the central cusp of dark matter halos in galaxies
- Kinetic relaxation and Bose-star formation in multicomponent dark matter- I
- Galactic Condensates composed of Multiple Axion Species
- Simulations of multi-field ultralight axion-like dark matter
- Cosmological Simulations of Two-Component Wave Dark Matter
- Normalized additional velocity distribution: testing the radial profile of dark matter halos and MOND
- Nested solitons in two-field fuzzy dark matter
- Quantum Tunneling of Ultralight Dark Matter Out of Satellite Galaxies