  In this work a density dependent quark model is revisited, its thermodynamic
consistency checked and the stability window for absolutely stable quark matter
obtained. The hypotheses of both pure quark matter with equal quark chemical
potentials and stellar matter subject to chemical stability and charge
neutrality are investigated. The parameters that appear in the density
dependent mass and satisfy the Bodmer-Witten conjecture are then used to
compute the masses and radii of strange stars. We show that the obtained values
are compatible with the recently observed massive stars.
