The formation of a stellar halo based on the
model by Cooper et al. (2010)
Substructure in the stellar halos of the Aquarius simulations (original title: Sagittarius and its siblings in the Aquarius simulations), by Helmi et al., 2011, ApJ 733, L7 High-res version.
XZ projection of stellar halo A, box size = 500 kpc on a side See here.
Same projection zoomed into the inner 100 kpc. See here