Baryon-driven growth of solitonic cores in fuzzy dark matter halos

Abstract

We present zoom-in simulations of fuzzy dark matter (FDM) halos including baryons and star-formation with sufficient resolution to follow the formation and evolution of central solitons. We find that their properties are determined by the local dark matter velocity dispersion in the combined dark matter-baryon gravitational potential. This motivates a simple prescription to estimate the radial density profiles of FDM cores in the presence of baryons. As cores become more massive and compact if baryons are included, galactic rotation curve measurements are likely harder to reconcile with FDM.

6 pages, 6 figures, matches published version

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• Fermion-Boson Stars as Attractors in Fuzzy Dark Matter and Ideal Gas Dynamics
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• Tidal disruption of solitons in self-interacting ultralight axion dark matter
• Exploration of simple scenarios involving Fuzzy Dark Matter cores and gas at local scales
• Temporal Correlations Between Fuzzy Dark Matter and Baryonic Matter in Virialized Core-Halo Structures