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Structure of Dark Matter Halos from Hierarchical Clustering

Published online by Cambridge University Press:  19 May 2006

G.A. Mamon ,
F. Combes ,
C. Deffayet ,
B. Fort  and
T. Fukushige
T. Fukushige*
Affiliation:
University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153-8902, Japan
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Abstract


We investigated the structure of the dark matter halo formed in the cold dark matter scenarios by N-body simulations with parallel treecode on GRAPE cluster systems (Fukushige et al. 2004, ApJ, 606, 625). We simulated 8 halos with the mass of 4.4 × 1014M๏ to 1.6 × 1015M๏ in the SCDM and LCDM model using up to 30 million particles. With the resolution of our simulations, the density profile is reliable down to 0.2 percent of the virial radius. Our results show that the slope of inner cusp within 1 percent virial radius is shallower than -1.5, and the radius where the shallowing starts exhibits run-to-run variation.


Type
Research Article
Information
European Astronomical Society Publications Series , Volume 20: Mass Profiles and Shapes of Cosmological Structures , 2006 , pp. 11 - 14
Copyright
© EAS, EDP Sciences, 2006

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