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Publication Details
 
Output Category: C1
Strategic Research Area: None
TISI Citations: 1 PlumX StatisticsPlumX Statistics
Scopus Citations:
Journal Impact: 4.96
All Authors: Cui, W, Power, C, Borgani, S, Knebe, A, Lewis, G, Murante, G, Poole, G Number:
UWA Authors: Power, C. Number: 1
Title: On the dynamical state of galaxy clusters: Insights from cosmological simulations - II
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY   
ISBN/ISSN 0035-8711
Year: 2017
Pages: 2502-2510
Volume: 464
Issue: 2
Full Reference (Harvard Style): Cui, W., Power, C., Borgani, S., Knebe, A., Lewis, G., Murante, G., Poole, G. 2017, 'On the dynamical state of galaxy clusters: Insights from cosmological simulations - II', MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 464, 2, pp. 2502-2510.
Abstract:

Using a suite of cosmology simulations of a sample of > 120 galaxy clusters with log (MDM, vir) = 14.5. We compare clusters that form in purely dark matter (DM) run and their counterparts in hydro-runs and investigate four independent parameters that are normally used to classify dynamical state. We find that the virial ratio ? in hydro-dynamical runs is ~10 per cent lower than in the DM run, and there is no clear separation between the relaxed and unrelaxed clusters for any parameter. Further, using the velocity dispersion deviation parameter ?, which is defined as the ratio between cluster velocity dispersion s and the theoretical prediction , we find that there is a linear correlation between the virial ratio ? and this ? parameter. We propose to use this ? parameter, which can be easily derived from observed galaxy clusters, as a substitute of the ? parameter to quantify the cluster dynamical state.