Palomar 5 and its tidal tails: New observational results
  Sloan Digital Sky Survey data for the field of the globular cluster Pal 5 reveal the existence of a long massive stream of tidal debris spanning an arc of 10 degrees on the sky. Pal 5 thus provides an outstanding example for tidal disruption of globular clusters in the Milky Way. Radial velocities from VLT spectra show that Pal 5 has an extremely low velocity dispersion, in accordance with the very low mass derived from its total luminosity. 
M. Odenkirchen, E.K. Grebel, W. Dehnen, H.-W. Rix, C.M. Rockosi, H.   Newberg, B. Yanny