  Axions, and axion-like particles, have come back into fashion in the last
decades as a possible solution to the galactic-scale crisis suffered by the
cold dark matter model. In the framework of the wave Dark Matter model, we have
carried out a Jeans Analysis on eight dwarf spheroidal galaxies that are
orbiting around the Milky Way, and we have constrained the boson mass.
Differently to a previous analysis, we adopted an anisotropy parameter that
varies with the distance from the centre of the galaxy to assess whether this
assumption would help to resolve, or at least alleviate, the well-known tension
with the value of the boson mass favoured by the cosmological analysis. Our
results indicate that, differently to what happens in ultra-faint dwarf
galaxies, such a tension cannot be lifted introducing a variable anisotropy
parameter, leaving as a possible solution the existence of additional axion or
axion-like particles with higher masses as naturally predicted in the Axiverse.

Astrophysics of Galaxies;Cosmology and Nongalactic Astrophysics;High Energy Physics - Theory