Phase-space correlation in stellar streams of the Milky Way halo: The
  clash of Kshir and GD-1
  We report the discovery of a 70-degree long stellar stream in the Milky Way
halo, which criss-crosses the well known "GD-1" stream. We show that this new
stellar structure ("Kshir") and GD-1 lie at similar distance, and are
remarkably correlated in kinematics. We propose several explanations for the
nature of this new structure and its possible association with GD-1. However, a
scenario in which these two streams were accreted onto the Milky Way within the
same dark matter sub-halo seems to provide a natural explanation for their
phase-space entanglement, and other complexities of this coupled-system.
