G. Battaglia (1), A. Helmi (1), H. Morrison (2), P. Harding (2), E. W. Olszewski (3), M. Mateo (4), K. C. Freeman (5), J. Norris (5), S. A. Shectman (6) ((1) Kapteyn Astronomical Institute, University of Groningen; (2) Astronomy Department, Case Western Reserve University; (3) Steward Observatory, University of Arizona; (4) Astronomy Department, University of Michigan; (5) Research School of Astronomy & Astrophysics, The Australian National University, Mount Stromlo; (6) Carnegie Observatories, Pasadena)
