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For refcode 1989AJ.....97.1279S:
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1989AJ.....97.1279S ON THE KINEMATICAL BEHAVIOR OF GALAXIES IN CLUSTERS LAERTE SODRE, JR., HUGO V. CAPELATO, AND JOAO E. STEINER Departamento de Astrofisica, Instituto de Pesquisas Espaciais, C.P. 515, 12201 Sao Jose dos Campos, Sao Paulo, Brazil ALAIN MAZURE Centre National de la Recherche Scientifique and Laboratoire D'Astronomie, Universite des Sciences et Techniques du Languedoc, 34060 Montpellier Cedex, France Received 14 October 1988; revised 14 December 1988 ABSTRACT We have analyzed the sample of 15 galaxy clusters published by Dressler and Shectman (1988a) to search for a trend for spiral and irregular galaxies to have greater velocity dispersion than the ellipticals and lenticulars. We have shown that this trend is highly significant, with a probability of less than 0.05% that it may result from statistical fluctuations in our sample of clusters. An analogous but much less significant effect appears also to be present between lenticular and elliptical galaxies. We interpret these results as evidence that late-type galaxies are still in the process of infalling towards the virialized cluster cores.
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