Modeling the core-halo mass relation in fuzzy dark matter halos
arXiv:2312.10744 · doi:10.1103/PhysRevD.110.023519
Abstract
Fuzzy dark matter (FDM) is an intriguing candidate alternative to the standard cold dark matter (CDM). The FDM model predicts that dark halos have characteristic core structures generated by the effect of quantum pressure, which is different from the structure of CDM halos. We devise a semi-analytic model of a FDM halo density profile by assuming that the density distribution results from the redistribution of mass in a halo with the Navarro-Frenk-White profile. We calculate the mass redistribution radius by considering dynamical relaxation within the FDM halo. We adopt a concentration-halo mass relation with lower concentration compared to that in the CDM model below the half mode mass, which originates from the suppressed matter density fluctuations at small length scales. Our model reproduces the core-halo mass relation (CHMR) found in the numerical simulation of \citet{2014NatPh..10..496S} at . We show that the CHMR is well described by a double power law, unlike previous studies that approximate it by a single power law. Our model predictions are in reasonable agreement with the results of the largest FDM simulation of \citet{2021MNRAS.506.2603M} at . We find that the core mass for a given halo mass follows the log-normal distribution, both in our model and in the simulation results for the first time, and quantitatively compare the variance of the distribution among them. Although our model does not fully explain the scatter of the CHMR, we show the scatter of the concentration-halo mass relation sizably contributes to them.
22 pages, 17 figures, published in PRD
References in corpus (17)
- Ultralight scalars as cosmological dark matter
- Too big to fail? The puzzling darkness of massive Milky Way subhaloes
- 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
- A universal model for halo concentrations
- Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
- Einstein rings modulated by wavelike dark matter from anomalies in gravitationally lensed images
- Ultra-light dark matter in disk galaxies
- Narrowing the mass range of Fuzzy Dark Matter with Ultra-faint Dwarfs
- 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
- Fuzzy Dark Matter and the Dark Energy Survey Year 1 Data
- 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
- Dark matter profiles of SPARC galaxies: a challenge to fuzzy dark matter
- An analytic model for the sub-galactic matter power spectrum in fuzzy dark matter halos
- Analytical approach to core-halo structure of fuzzy dark matter