Correlations between kinematics and metallicity in the Galactic bulge: a
  review
  Recent large scale surveys of galactic bulge stars allowed to build a
detailed map of the bulge kinematics. The bulge exhibits cylindrical rotation
consistent with a disky origin which evolved through bar driven secular
evolution. However correlations between metallicity and kinematics complicate
this picture. In particular a metal-poor component with distinct kinematic
signatures has been detected. Its origin, density profile and link with the
other Milky Way stellar populations are currently still poorly constrained.
