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hub:subTitle
I. Internal kinematics
dcterms:title
Formation and evolution of dwarf early-type galaxies in the Virgo cluster
dcterms:date
2011-01-01
rdaw:P10072
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dcterms:abstract
We present new medium resolution kinematic data for a sample of 21 dwarf early-type galaxies (dEs) mainly in the Virgo cluster, obtained with the WHT and INT telescopes at the Roque de los Muchachos Observatory (La Palma, Spain). These data are used to study the origin of the dwarf elliptical galaxy population inhabiting clusters. We confirm that dEs are not dark matter dominated galaxies, at least not up to the half-light radius. We also find that the observed galaxies in the outer parts of the cluster are mostly rotationally supported systems with disky morphological shapes. Rotationally supported dEs have rotation curves similar to those of star-forming galaxies of similar luminosity and follow the Tully-Fisher relation. This is expected if dE galaxies are the descendants of low-luminosity star-forming systems that have recently entered the cluster environment and lost their gas due to a ram-pressure stripping event, quenching their star formation activity and transforming into quiescent systems, but conserving their angular momentum.
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n12:researcharticle
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aa15344-10
dcterms:dateCopyrighted
2011-01-01
dcterms:rights
© ESO, 2011
dcterms:rightsHolder
ESO
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