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astro-ph2008★ 17 cited
Sigma-drop in galaxies and the sigma-metallicity degeneracy
Mina Koleva, Philippe Prugniel, Sven De Rijcke
In some galaxies, the central velocity dispersion, sigma, is depressed with respect to the surroundings. This sigma-drop phenomenon may have different physical origins, bearing inf…
astro-ph2007★ 28 cited
Towards a Solution for the Ca II Triplet Puzzle : Results from Dwarf Elliptical Galaxies
Dolf Michielsen, Mina Koleva, Philippe Prugniel +6
We present new estimates of ages and metallicities, based on FORS/VLT optical (4400-5500A) spectroscopy, of 16 dwarf elliptical galaxies (dE's) in the Fornax Cluster and in Souther…