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Paper detail

Dynamics and Shape of Brightest Cluster Galaxies

We identified Brightest Cluster Members (BCM) on DSS images of 1083 Abell clusters, derived their individual and host cluster redshifts from literature and determined the BCM ellipticity. Half the BCMs move at a speed higher than 37 % of the cluster velocity dispersion sigma_{cl}, suggesting that most BCMs are part of substructures falling into the main cluster. Both, the BCM's velocity offset in units of sigma_{cl}, and BCM ellipticity, weakly decrease with cluster richness.

preprint2006arXivOpen access
H. AndernachK. Alamo-MartinezR. CoziolE. Tago
astro-ph
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H. AndernachK. Alamo-MartinezR. CoziolE. Tago

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