559 citations · 9.7k across the 192 of their papers we have counts for
10 papers · 1 filter
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…
Internal Properties of Ultra-Compact Dwarf Galaxies in the Virgo Cluster
E. A. Evstigneeva, M. D. Gregg, M. J. Drinkwater +1
We present new imaging and spectroscopic observations of six ultra-compact dwarf (UCD) galaxies in the Virgo Cluster, along with re-analysed data for five Fornax Cluster UCDs. Thes…
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…
The early-type dwarf galaxy population of the Fornax cluster
S. Mieske, M. Hilker, L. Infante +1
AIMS: We analyse the photometric properties of the early-type Fornax cluster dwarf galaxy population, based on a wide field imaging study of the central cluster area in V and I. We…
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…
Dynamics of the NGC 4636 Globular Cluster System - An extremely dark matter dominated galaxy?
Y. Schuberth, T. Richtler, B. Dirsch +4
We present the first dynamical study of the globular cluster system of NGC 4636. This giant elliptical galaxy is claimed to be extremely dark matter dominated, according to X-ray o…
The old globular cluster system of the dIrr galaxy NGC1427A in the Fornax cluster
Iskren Y. Georgiev, Michael Hilker, Thomas H. Puzia +5
We present a study of the old globular cluster (GC) population of the dwarf irregular galaxy NGC 1427A using multi-wavelength VLT observations in U, B, V, I, H_alpha, J, H, and Ks…