Dynamical Galactic Halo Reconstruction from Rotation Curves in Self-Interacting Fuzzy Dark Matter

Milos Indjin; I-Kang Liu; Nick P. Proukakis; Gerasimos Rigopoulos; Aditya Verma

Paper

Dynamical Galactic Halo Reconstruction from Rotation Curves in Self-Interacting Fuzzy Dark Matter

Abstract

Fuzzy Dark Matter with an explicitly non-zero quartic self-interaction (gFDM) is shown to be a viable model for simultaneously fitting 17 dark-matter-dominated galaxies from the SPARC database, constraining both the boson mass,

, and the self-coupling constant,

, to values within the range

and

; this is based on the combination of an appropriately constructed static super-Gaussian profile for the inner galactic core (`soliton') region, and a Navarro-Frenk-White profile for the surrounding halo region. Identification of these parameters enables the explicit {\em dynamical} reconstruction of potential host halos for such galaxies, for which we outline a procedure with a proof-of-principle demonstration for two galaxies (UGCA444, UGC07866) shown to yield viable rotation curves over a dynamical period of