Multiresolution Analysis of Substructure in Dark Matter Halos

Details Multiresolution Analysis of Substructure in Dark Matter Halos Multiresolution Analysis of Substructure in Dark Matter Halos

2000-09-19

arxiv.org/abs/astro-ph/0009306v2

Astrophys.J. 578 (2002) 689-701

Astronomy and Astrophysics

Astrophysics

22 pages, 12 figures, substantial changes and additions over original submission, to be published in the Astrophysical Journal

Scientific paper

10.1086/342645

Multiresolution analysis is applied to the problem of halo identification in cosmological N-body simulations. The procedure makes use of a discrete wavelet transform known as the algorithme a trous and segmentation analysis. It has the ability to find subhalos in the dense regions of a parent halo and can discern the multiple levels of substructure expected in the hierarchical clustering scenario. As an illustration, a 500,000 particle dark matter halo is analyzed and over 600 subhalos are found. Statistical properties of the subhalo population are discussed.

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