Galactic discs embedded in fuzzy dark matter haloes

Document Type

Conference Proceeding

Publication Date

12-2024

Abstract

We investigate the dynamical impact of a dark matter consisting of very light axions, fuzzy dark matter, on stellar discs of Milky-Way type galaxies. Density fluctuations resulting from the finite de Broglie wavelength of fuzzy dark matter imply force fluctuations applying on classical test particles. Discs are heated by these perturbative forces whose intensity increases when the assumed axion mass decreases. Stellar discs are simulated either in cold dark matter haloes or in fuzzy dark matter haloes with different values of the mass of the axion. For small values of this mass, we observe a thickening of the discs and only very mild non-axisymmetries which are incompatible with observations.

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