It was shown several years ago that dark matter halo outskirts are characterized by very steep density profiles in a small radial range. This feature has been interpreted as pile-up of different particle orbits at similar location, namely, splashback material half an orbit after collapse. Adhikari et al. (2014) obtained the location radius through simple model calculating shell trajectory secon...

If the Planck length is chosen as natural scale of Universe, Penrose-Carter diagram associated with classical gravitational collapse a thin spherical shell massless matter reveals, beyond and in agreement claimed non locality horizon, quantum nature whole process.