The Large Peculiar Velocity of the cD Galaxy in Abell 3653

Abstract

We present a catalogue of galaxies in Abell 3653 from observations made with the 2dF spectrograph at the Anglo-Australian Telescope. Of the 391 objects observed, we find 111 are bone-fide members of Abell 3653. We show that the cluster has a velocity of cz = 32214 +/- 83 km/s (z=0.10738 +/- 0.00027), with a velocity dispersion typical of rich, massive clusters of sigma_{cz} = 880^{+66}_{-54}. We find that the cD galaxy has a peculiar velocity of 683 +/- 96 km/s in the cluster restframe - some 7sigma away from the mean cluster velocity, making it one of the largest and most significant peculiar velocities found for a cD galaxy to date. We investigate the cluster for signs of substructure, but do not find any significant groupings on any length scale. We consider the implications of our findings on cD formation theories.

arXiv comment16 pages, including 7 figures and a long table. Accepted for publication in MNRAS

References in corpus (9)

• The 2dF Galaxy Redshift Survey: Spectra and redshifts
• The Origin of the Brightest Cluster Galaxies
• A class of compact dwarf galaxies from disruptive processes in galaxy clusters
• The HIPASS Catalogue: III - Optical Counterparts & Isolated Dark Galaxies
• The Las Campanas/AAT Rich Cluster Survey III: Spectroscopic Studies of X-ray Bright Galaxy Clusters at z~0.1
• Galactic cannibalism and CDM density profiles
• A Collision of Subclusters in Abell 754
• Galactic cannibalism in the galaxy cluster C0337-2522 at z=0.59
• Witnessing the Hierarchical Assembly of the Brightest Cluster Galaxy in a Cluster at z=1.26

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• Cold gas dynamics in Hydra-A: evidence for a rotating disk
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• Dynamical history of a binary cluster: Abell 3653
• On the Formation of cD Galaxies and their Parent Clusters
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• The Rotational Profiles of Cluster Galaxies
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