New Evidence for Caustic Rings based on GAIA and 3D Dustmap*

The infall of cold dark matter produces discrete flows and caustic structures in the galactic halo. Under axial and reflection symmetry, and dominated by a net overall rotation, the caustic structure would take the shape of a ring with a ‘tricusp’ cross section. We present features found in the GAIA skymap and the 3D dustmap with Pan-STARRS 1 as possible evidence for such a caustic ring structure. We give an estimate of the location and dimensions of the ring and its implication on the local dark matter flow density and the velocity vector.