  In the present work we use the vector MIT bag model to describe quark matter
and obtain the macroscopic properties of neutron stars. We also calculate the
speed of sound of quark matter described by this model with specific parameter
values and check if the results obey the conformal limit at high densities. We
have seen that the vector MIT bag model produces stars with masses and radii
consistent with recent data, suggesting the possible existence of massive quark
(or strange) stars.
