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Dynamical masses of ultra-compact dwarf galaxies in Fornax
M. Hilker, H. Baumgardt, L. Infante +3
Aims. We determine masses and mass-to-light ratios of five ultra-compact dwarf galaxies and one dwarf elliptical nucleus in the Fornax cluster from high resolution spectroscopy. Me…
Medium resolution spectroscopy in Omega Centauri: abundances of 400 subgiant and turn-off region
Andrea Kayser, Michael Hilker, Tom Richtler +1
Medium resolution spectra of more than 400 subgiant and turn-off region stars in Omega Centauri were analysed. The observations were performed at the VLT/Paranal with FORS2/MXU. In…
Ultra-Compact Stellar Systems in the Fornax Galaxy Cluster
P. Firth, M. J. Drinkwater, E. A. Evstigneeva +6
Our VLT (FLAMES) observations near NGC1399 investigate the connection between ultra-compact dwarf galaxies (UCDs), NGC1399 globular clusters and intra-cluster globulars. We have un…
An I-band calibration of the SBF method at blue colours
S. Mieske, M. Hilker, L. Infante
The surface brightness fluctuation (SBF) method is a powerful tool to derive distances to galaxies for which single stars cannot be resolved. Up to now, the method has been calibra…
Multi-colour Imaging of Ultra-compact Objects in the Fornax Cluster
A. M. Karick, M. D. Gregg, M. J. Drinkwater +2
Ultra-compact dwarf galaxies (UCDs) are a new type of galaxy we have discovered in the central region of the Fornax and Virgo clusters. Unresolved in ground-based imaging, UCDs hav…
UCDs - a mixed bag of objects
Michael Hilker
The name "Ultra-Compact Dwarf Galaxy" (UCD) was invented for a new type of astronomical object that has been discovered in cores of nearby galaxy clusters a decade ago. UCDs resemb…