A two-parameter model including soliton self-gravity shows that simulated fuzzy dark matter cores sit between the self-gravity and host-halo regimes, and that core-halo scatter depends on both halo concentration and core-intrinsic features.
Baryon-driven growth of solitonic cores in fuzzy dark matter halos
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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.
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Soliton self-gravity and core-halo relation in fuzzy dark matter halos
A two-parameter model including soliton self-gravity shows that simulated fuzzy dark matter cores sit between the self-gravity and host-halo regimes, and that core-halo scatter depends on both halo concentration and core-intrinsic features.