  We study the properties of the dark matter component of the radially
anisotropic stellar population recently identified in the Gaia data, using
magneto-hydrodynamical simulations of Milky Way-like halos from the Auriga
project. We identify 10 simulated galaxies that approximately match the
rotation curve and stellar mass of the Milky Way. Four of these have an
anisotropic stellar population reminiscent of the Gaia structure. We find an
anti-correlation between the dark matter mass fraction of this population in
the Solar neighbourhood and its orbital anisotropy. We estimate the local dark
matter density and velocity distribution for halos with and without the
anisotropic stellar population, and use them to simulate the signals expected
in future xenon and germanium direct detection experiments. We find that a
generalized Maxwellian distribution fits the dark matter halo integrals of the
Milky Way-like halos containing the radially anisotropic stellar population.
For dark matter particle masses below approximately 10 GeV, direct detection
exclusion limits for the simulated halos with the anisotropic stellar
population show a mild shift towards smaller masses compared to the commonly
adopted Standard Halo Model.
