Multiresolution Analysis of Substructure in Dark Matter Halos
Astrophysics
2009-10-31 v2
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/0009306,
title = {Multiresolution Analysis of Substructure in Dark Matter Halos},
author = {Michael D. Seymour and Lawrence M. Widrow},
journal= {arXiv preprint arXiv:astro-ph/0009306},
year = {2009}
}
Comments
22 pages, 12 figures, substantial changes and additions over original submission, to be published in the Astrophysical Journal, Oct, 2002