Mapping Substructures in Dark Matter Halos

Details Mapping Substructures in Dark Matter Halos Mapping Substructures in Dark Matter Halos

2004-07-20

arxiv.org/abs/astro-ph/0407418v2

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, MNRAS accepted - minor editing without changing the conclusions, a high-resolution version of the paper is

Scientific paper

10.1111/j.1745-3933.2005.08666.x

We present a detailed study of the real and integrals-of-motion space distributions of a satellite obtained from a self-consistent high-resolution simulation of a galaxy cluster and re-simulated using various analytical halo potentials. We found that the disrupted satellite appears as a coherent structure in integrals-of-motion space in all models (``live'' and analytical potential) although the distribution is significantly smeared for the live host halo. Further the primary mechanism for this smearing is the mass growth of the host, which changes both the energy and angular momentum of the satellite debris. Hence, this must be considered when searching for (stellar) streams with future observational experiments such as RAVE and GAIA.

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