We study the so called hybrid stars, which are hadronic stars that contain a
core of deconfined quarks. For this purpose, we make use of an extended version
of the SU(3) chiral model. Within this approach, the degrees of freedom change
naturally from hadrons (baryon octet) to quarks (u, d, s) as the temperature
and/or density increases. At zero temperature we are still able to reproduce
massive stars, even with the inclusion of hyperons.Comment: To appear in the proceedings of Conference C12-08-0