  We perform large scale simulations of the frustrated Ising lattice gas, a
three-dimensional lattice model of a structural glass, using the parallel
tempering technique. We evaluate the spin and density overlap distributions,
and the corresponding non-linear susceptibilities, as a function of the
chemical potential. We then evaluate the relaxation functions of the spin and
density self-overlap, and study the behavior of the relaxation times. The
results suggest that the spin variables undergo a transition very similar to
the one of the Ising spin glass, while the density variables do not show any
sign of transition at the same chemical potential. It may be that the density
variables undergo a transition at a higher chemical potential, inside the phase
where the spins are frozen.
