Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-16554

Zemp, M; Moore, B; Stadel, J; Carollo, C M; Madau, P (2008). Multimass spherical structure models for N-body simulations. Monthly Notices of the Royal Astronomical Society, 386(3):1543-1556.

[img]
Preview
PDF (Accepted manuscript, Version 2)
528kB

View at publisher
[img]
Preview
Accepted Version
PDF (Accepted manuscript, Version 1)
485kB

Abstract

We present a simple and efficient method to set up spherical structure models for N-body simulations with a multimass technique. This technique reduces by a substantial factor the computer run time needed in order to resolve a given scale as compared to single-mass models. It therefore allows to resolve smaller scales in N-body simulations for a given computer run time. Here, we present several models with an effective resolution of up to 1.68 × 109 particles within their virial radius which are stable over cosmologically relevant time-scales. As an application, we confirm the theoretical prediction by Dehnen that in mergers of collisionless structures like dark matter haloes always the cusp of the steepest progenitor is preserved. We model each merger progenitor with an effective number of particles of approximately 108 particles. We also find that in a core–core merger the central density approximately doubles whereas in the cusp–cusp case the central density only increases by approximately 50 per cent. This may suggest that the central regions of flat structures are better protected and get less energy input through the merger process.

Citations

22 citations in Web of Science®
22 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

19 downloads since deposited on 10 Mar 2009
10 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
DDC:530 Physics
Language:English
Date:May 2008
Deposited On:10 Mar 2009 17:08
Last Modified:30 Jun 2014 17:24
Publisher:Wiley-Blackwell
ISSN:0035-8711
Additional Information:The definitive version is available at www.blackwell-synergy.com
Publisher DOI:10.1111/j.1365-2966.2008.13126.x
Related URLs:http://arxiv.org/abs/0710.3189

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page