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arXiv · 2312.14917

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

Milos Indjin·I-Kang Liu·Nick P. Proukakis·Gerasimos Rigopoulos
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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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Milos Indjin, I-Kang Liu, Nick P. Proukakis, Gerasimos Rigopoulos. 2023-12-22. Virialized Profiles and Oscillations of Self-interacting Fuzzy Dark Matter Solitons. https://doi.org/10.1103/physrevd.109.103518

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