2010

The preferred direction of infalling satellite galaxies in the Local Group

Libeskind, Noam I, Knebe, Alexander, Hoffman, Yehuda et al.

Understand

Using a high resolution DM simulation of the Local Group (LG), conducted within the framework of the Constrained Local UniversE Simulation (CLUES) project, we investigate the nature of how satellites of the MW and M31 are accreted.

Satellites of these galaxies are accreted anisotropically, entering the virial radius of their hosts from specific "spots" with respect to the large scale structure.
Furthermore, material which is tidally stripped from these satellites is also, at z=0, distributed anisotropically and is characterized by an ellipsoidal sub-volume embedded in the halo.
The angular pattern created by the locus of satellite infall points and the projected stripped DM is investigated within a coordinate system determined by the location of the LG companion and the simulated Virgo cluster across concentric shells ranging from 0.1 to 5 r_vir.

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