A Caltech Library Service

Morphology and evolution of simulated and optical clusters: a comparative analysis

Rahman, Nurur and Krywult, Janusz and Motl, Patrick M. and Flin, Piotr and Shandarin, Sergi F. (2006) Morphology and evolution of simulated and optical clusters: a comparative analysis. Monthly Notices of the Royal Astronomical Society, 367 (2). pp. 838-850. ISSN 0035-8711. doi:10.1111/j.1365-2966.2005.10014.x.

[img] PDF - Published Version
See Usage Policy.

[img] PDF - Accepted Version
See Usage Policy.


Use this Persistent URL to link to this item:


We have made a comparative study of morphological evolution in simulated dark matter (DM) haloes and X-ray brightness distribution, and in optical clusters. Samples of simulated clusters include star formation with supernovae feedback, radiative cooling and simulation in the adiabatic limit at three different redshifts, z = 0.0, 0.10 and 0.25. The optical sample contains 208 Abell, Corwin & Olowin (ACO) clusters within redshift, z ≤ 0.25. Cluster morphology, within 0.5 and 1.0 h⁻¹ Mpc from cluster centre, is quantified by multiplicity and ellipticity. We find that the distribution of the DM haloes in the adiabatic simulation appears to be more elongated than the galaxy clusters. Radiative cooling brings halo shapes in excellent agreement with observed clusters; however, cooling along with feedback mechanism makes the haloes more flattened. Our results indicate relatively stronger structural evolution and more clumpy distributions in observed clusters than in the structure of simulated clusters, and slower increase in simulated cluster shapes compared to those in the observed one. Within z ≤ 0.1, we note an interesting agreement in the shapes of clusters obtained from the cooling simulations and observation. We also note that the different samples of observed clusters differ significantly in morphological evolution with redshift. We highlight a few possibilities responsible for the discrepancy in morphological evolution of simulated and observed clusters.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Additional Information:© 2006 RAS. Accepted 2005 December 16. Received 2005 December 08; in original form 2005 May 12. We thank the anonymous referee for constructive comments and criticisms which helped us improve the quality of this paper. We thank M. Plionis for providing the APM cluster ellipticity data and Scott W. Chambers for the MCM data sets. NR thanks Hume Feldman and Bruce Twarog for many useful discussions.
Subject Keywords:methods: N-body simulations, methods: statistical, dark matter, large-scale structure of Universe
Issue or Number:2
Record Number:CaltechAUTHORS:20201204-154217533
Persistent URL:
Official Citation:Nurur Rahman, Janusz Krywult, Patrick M. Motl, Piotr Flin, Sergei F. Shandarin, Morphology and evolution of simulated and optical clusters: a comparative analysis, Monthly Notices of the Royal Astronomical Society, Volume 367, Issue 2, April 2006, Pages 838–850,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106922
Deposited By: Rebecca Minjarez
Deposited On:09 Dec 2020 18:26
Last Modified:16 Nov 2021 18:58

Repository Staff Only: item control page