The dynamical state of massive galaxy clusters

Details The dynamical state of massive galaxy clusters The dynamical state of massive galaxy clusters

2006-04-10

arxiv.org/abs/astro-ph/0604205v1

Astronomy and Astrophysics

Astrophysics

2 pages, 2 figures. Contributed talk, XIth IAU Latin-American Regional Meeting (Dec. 2005, Pucon, Chile), to appear in RMxAA

Scientific paper

We study the mass distribution of a sample of 24 X-ray bright Abell clusters through weak gravitational lensing. This method is independent of the dynamical state of the galaxy cluster. Hence, by comparing dynamical and lensing mass estimators, we can access the dynamical state of these clusters. We have found that clusters with ICM temperatures above 8 keV show strong deviations from the relaxation, as well as the presence of prominent sub-structures. For the remaining clusters (the majority of the sample) we have found agreement among the several mass estimators, which indicates that most of the clusters are in or close to a state of dynamical equilibrium.

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