  We prove that finite index subgroups of right angled Artin groups are
conjugacy separable. We then apply this result to establish various properties
of other classes of groups. In particular, we show that any word hyperbolic
Coxeter group contains a conjugacy separable subgroup of finite index and has a
residually finite outer automorphism group. Another consequence of the main
result is that Bestvina-Brady groups are conjugacy separable and have solvable
conjugacy problem.
