2025/02/07 by Indjin, Milos, Liu, I-Kang, Proukakis, Nick P. +2 · 1 citation
#Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2502.04838
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, m, and the self-coupling constant, g, to values within the range log10((m)/(eV/c2)) = log10(1.98)-22+0.8-0.6 and log10((g)/(Jm3/kg)) = log10(1.45)-28+0.4-1.2; 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 O(1) Gyr.