The Vertical Structure of the Halo Rotation
  New GSC-II proper motions of RR Lyrae and Blue Horizontal Branch (BHB) stars near the North Galactic Pole are used to show that the Galactic Halo 5 kpc above the Plane has a significantly retrograde galactic rotation. 
T.D. Kinman (NOAO), C. Cacciari (INAF-Oss.Astr. Bologna), A. Bragaglia   (INAF-Oss.Astr. Bologna), A. Buzzoni (INAF-TNG), A....