The large peculiar velocity of the cD galaxy in Abell 3653

Pimbblet, Kevin A., Roseboom, Isaac G. and Doyle, Marianne T. (2006) The large peculiar velocity of the cD galaxy in Abell 3653. Monthly Notices Of The Royal Astronomical Society, 368 2: 651-658. doi:10.1111/j.1365-2966.2006.10131.x

Author Pimbblet, Kevin A.
Roseboom, Isaac G.
Doyle, Marianne T.
Title The large peculiar velocity of the cD galaxy in Abell 3653
Journal name Monthly Notices Of The Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
Publication date 2006
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2006.10131.x
Open Access Status DOI
Volume 368
Issue 2
Start page 651
End page 658
Total pages 8
Editor A. C. Fabian
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2006
Language eng
Abstract We present a catalogue of galaxies in Abell 3653 from observations made with the 2-degree field (2dF) spectrograph at the Anglo-Australian Telescope. Of the 391 objects observed, we find 111 are bona fide members of Abell 3653. We show that the cluster has a velocity of cz= 32 214 +/- 83 km s(-1) (z= 0.10 738 +/- 0.00 027), with a velocity dispersion typical of rich, massive clusters of sigma(cz)= 880(-54)(+66). We find that the cD galaxy has a peculiar velocity of 683 +/- 96 km s(-1) in the cluster rest frame - some 7 sigma 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.
Keyword catalogues
galaxies : clusters : individual : Abell 3653
galaxies : elliptical and lenticular
galaxies : kinematics and dynamics
Brightest Cluster Galaxies
Rich Clusters
Galactic Cannibalism
Multiple Nuclei
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 09:21:36 EST