Header

UZH-Logo

Maintenance Infos

Convergence and scatter of cluster density profiles


Diemand, Jürg; Moore, Ben; Stadel, Joachim (2004). Convergence and scatter of cluster density profiles. Monthly Notices of the Royal Astronomical Society, 353(2):624-632.

Abstract

We present new results from a series of ΛCDM simulations of cluster mass haloes resolved with high force and mass resolution. These results are compared with recently published simulations from groups using various codes including pkdgrav, art, tpm, grape and gadget. Careful resolution tests show that with 25 million particles within the high-resolution region we can resolve to about 0.3 per cent of the virial radius and that convergence in radius is proportional to the mean interparticle separation. The density profiles of 26 high-resolution clusters obtained with the different codes and from different initial conditions agree very well. The average logarithmic slope at one per cent of the virial radius is γ= 1.26 with a scatter of ±0.17. Over the entire resolved regions the density profiles are well fitted by a smooth function that asymptotes to a central cusp ρ∝r−γ, where we find γ= 1.16 ± 0.14 from the mean of the fits to our six highest-resolution clusters

Abstract

We present new results from a series of ΛCDM simulations of cluster mass haloes resolved with high force and mass resolution. These results are compared with recently published simulations from groups using various codes including pkdgrav, art, tpm, grape and gadget. Careful resolution tests show that with 25 million particles within the high-resolution region we can resolve to about 0.3 per cent of the virial radius and that convergence in radius is proportional to the mean interparticle separation. The density profiles of 26 high-resolution clusters obtained with the different codes and from different initial conditions agree very well. The average logarithmic slope at one per cent of the virial radius is γ= 1.26 with a scatter of ±0.17. Over the entire resolved regions the density profiles are well fitted by a smooth function that asymptotes to a central cusp ρ∝r−γ, where we find γ= 1.16 ± 0.14 from the mean of the fits to our six highest-resolution clusters

Statistics

Citations

Dimensions.ai Metrics
191 citations in Web of Science®
193 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

2 downloads since deposited on 19 Oct 2018
2 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:National licences > 142-005
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:Space and Planetary Science, Astronomy and Astrophysics
Language:English
Date:1 September 2004
Deposited On:19 Oct 2018 06:18
Last Modified:24 Nov 2018 02:57
Publisher:Oxford University Press
ISSN:0035-8711
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1111/j.1365-2966.2004.08094.x
Related URLs:https://www.swissbib.ch/Search/Results?lookfor=nationallicenceoxford101111j13652966200408094x (Library Catalogue)

Download

Download PDF  'Convergence and scatter of cluster density profiles'.
Preview
Content: Published Version
Language: English
Filetype: PDF (Nationallizenz 142-005)
Size: 165kB
View at publisher