  We investigate the axial w quasi-normal modes of neutron stars for 18
realistic equations of state in order to study the influence of hyperons and
quarks on the modes. The study has been developed with a new method based on
Exterior Complex Scaling with variable angle, which allow us to generate pure
outgoing quasi-normal modes. A complete study of the junction conditions has
been done. We have obtained that w-modes can be used to distinguish between
neutron stars with exotic matter and without exotic matter for compact enough
stars.
