The dynamical structure of dwarf elliptical galaxies |
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Authors: | WW Zeilinger S De Rijcke H Dejonghe GKT Hau |
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Institution: | 1. Institut für Astronomie, Universit?t Wien, Türkenschanzstr. 17, A-1180, Wien, Austria 2. Sterrenkundig Observatorium, Ghent University, Krijgslaan 281, S9, B-9000, Ghent, Belgium 3. ESO, Alonso de Cordova 3107, Santiago de Chile, Chile
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Abstract: | Deep imaging and long-slit spectroscopy was obtained for a sample of dwarf ellipticals in the Fornax cluster, NGC 5044 and
NGC 5898 groups using the ESO VLT. The observational data extend out to typically 1.5–2 effective radii and indicate a kinematic
dichotomy in the family of ellipticals. The observed stellar kinematics indicate a luminosity–velocity dispersion relation
largely supporting Supernova-driven stellar mass loss scenarios for the formation of dwarf ellipticals. Stellar dynamical
models favour dark matter halos with typical mass-to-light ratios in the range of 3 to 9 solar units.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | dwarf galaxies dark matter |
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