Virialized Profiles and Oscillations of Self-interacting Fuzzy Dark Matter Solitons

Abstract

We investigate the effect of self-interactions on the shape and oscillations of the solitonic core profile of condensed fuzzy dark matter systems without the backdrop of a halo, revealing universal features in terms of an appropriately scaled interaction strength characterizing the crossover between the weakly- and strongly-interacting regimes. Our semi-analytical results are further confirmed by spherically symmetric simulations of the Gross-Pitaevskii-Poisson equations. Inverting our obtained relations, we highlight a degeneracy that could significantly affect constraints on the boson mass in the presence of repulsive boson self-interactions and propose the simultaneous extraction of static and dynamical solitonic features as a way to uniquely constrain both the boson mass and self-interactions.

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Cited by in corpus (3)

• Single and merger soliton dynamics in scalar field dark matter with and without self-interactions
• Dynamical reconstruction of SPARC galactic halos within self-interacting fuzzy dark matter
• Collective Excitations of Self-Gravitating Ultralight Dark Matter Cores