Nested solitons in two-field fuzzy dark matter
arXiv:2309.05694 · doi:10.1093/mnras/stad3482
Abstract
Dark matter as scalar particles consisting of multiple species is well motivated in string theory where axion fields are ubiquitous. A two-field fuzzy dark matter (FDM) model features two species of ultralight axion particles with different masses, , which is extended from the standard one-field model with . Here we perform numerical simulations to explore the properties of two-field FDM haloes. We find that the central soliton has a nested structure when , which is distinguishable from the generic flat-core soliton in one-field haloes. However, the formation of this nested soliton is subject to many factors, including the density fraction and mass ratio of the two fields. Finally, we study non-linear structure formation in two-field cosmological simulations with self-consistent initial conditions and find that the small-scale structure in two-field cosmology is also distinct from the one-field model in terms of DM halo counts and soliton formation time.
arXiv comment11 pages, 5 figures. Published version
References in corpus (47)
- The Structure of Cold Dark Matter Halos
- Efficient Computation of CMB anisotropies in closed FRW models
- E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
- Observational evidence for self-interacting cold dark matter
- Axion Cosmology
- String Axiverse
- Cold and Fuzzy Dark Matter
- Ultralight scalars as cosmological dark matter
- Axions In String Theory
- The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
- Too big to fail? The puzzling darkness of massive Milky Way subhaloes
- Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
- The Core-Cusp Problem
- Cuspy No More: How Outflows Affect the Central Dark Matter and Baryon Distribution in Lambda CDM Galaxies
- WIMP dark matter candidates and searches - current status and future prospects
- Understanding the Core-Halo Relation of Quantum Wave Dark Matter, DM, from 3D Simulations
- The dependence of dark matter profiles on the stellar to halo mass ratio: a prediction for cusps vs cores
- First constraints on fuzzy dark matter from Lyman- forest data and hydrodynamical simulations
- The unexpected diversity of dwarf galaxy rotation curves
- The Arepo public code release
- The haloes of bright satellite galaxies in a warm dark matter universe
- Wave Dark Matter
- Improving the convergence properties of the moving-mesh code AREPO
- Galaxy Formation with BECDM: I. Turbulence and relaxation of idealised haloes
- Simulations of solitonic core mergers in ultra-light axion dark matter cosmologies
- Constraining the mass of light bosonic dark matter using SDSS Lyman- forest
- Too Big to Fail in the Local Group
- Lyman-alpha Constraints on Ultralight Scalar Dark Matter: Implications for the Early and Late Universe
- Strong Constraints on Fuzzy Dark Matter from Ultrafaint Dwarf Galaxy Eridanus II
- The Large-Misalignment Mechanism for the Formation of Compact Axion Structures: Signatures from the QCD Axion to Fuzzy Dark Matter
- Late-time Phase transition and the Galactic halo as a Bose Liquid: (II) the Effect of Visible Matter
- First star-forming structures in fuzzy cosmic filaments
- On the Schrodinger-Poisson--Vlasov-Poisson correspondence
- Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
- AxioNyx: Simulating Mixed Fuzzy and Cold Dark Matter
- Narrowing the mass range of Fuzzy Dark Matter with Ultra-faint Dwarfs
- A lensed radio jet at milli-arcsecond resolution II: Constraints on fuzzy dark matter from an extended gravitational arc
- The halo mass function and filaments in full cosmological simulations with fuzzy dark matter
- Cosmological Structure Formation and Soliton Phase Transition in Fuzzy Dark Matter with Axion Self-Interactions
- Multiple Ultralight Axionic Wave Dark Matter and Astronomical Structures
- Cosmological Perturbations of Extreme Axion in the Radiation Era
- Multifield Ultralight Dark Matter
- Friendship in the Axiverse: Late-time direct and astrophysical signatures of early-time nonlinear axion dynamics
- Galactic Condensates composed of Multiple Axion Species
- Simulations of multi-field ultralight axion-like dark matter
- Cosmological Simulations of Two-Component Wave Dark Matter
- Axi-Higgs cosmology: Cosmic Microwave Background and cosmological tensions