559 citations · 9.7k across the 192 of their papers we have counts for
9 papers · 2 filters
Isolated elliptical galaxies and their globular cluster systems. II. NGC 7796 - globular clusters, dynamics, companion
T. Richtler, R. Salinas, R. R. Lane +2
We investigate the globular cluster system of the isolated elliptical NGC 7796, present new photometry of the galaxy, and use published kinematical data to constrain the dark matte…
A 3D view of the Hydra I cluster core - II. Stellar populations
Carlos Eduardo Barbosa, Magda Arnaboldi, Michael Hilker +3
Several observations of the central region of the Hydra I galaxy cluster point to a multi-epoch assembly history. Using our novel FORS2/VLT spectroscopic data set, we were able to…
A 3D view of the Hydra I galaxy cluster core - I. Kinematic substructures
Michael Hilker, Carlos Eduardo Barbosa, Tom Richtler +3
We used FORS2 in MXU mode to mimic a coarse 'IFU' in order to measure the 3D large-scale kinematics around the central Hydra I cluster galaxy NGC 3311. Our data show that the veloc…
News from the isolated ellipticals NGC 5812, NGC 7507, and NGC 7796
Tom Richtler, Ricardo Salinas, Richard Lane +3
We report on ongoing photometric and spectroscopic work on a sample of isolated elliptical galaxies. We investigate their globular cluster systems, and use the kinematics of globul…
A Supermassive Black Hole in an Ultracompact Dwarf Galaxy
Anil Seth, Remco van den Bosch, Steffen Mieske +11
Ultracompact dwarf galaxies (UCDs) are among the densest stellar systems in the universe. These systems have masses up to 200 million solar masses, but half light radii of just 3-5…
Contribution of stripped nuclear clusters to globular cluster and ultra-compact dwarf galaxy populations
Joel Pfeffer, Brendan F. Griffen, Holger Baumgardt +1
We use the Millennium II cosmological simulation combined with the semi-analytic galaxy formation model of Guo et al. (2011) to predict the contribution of galactic nuclei formed b…
The colour-magnitude relation of Globular Clusters in Centaurus and Hydra - Constraints on star cluster self-enrichment with a link to massive Milky Way GCs
J. Fensch, S. Mieske, J. Mueller-Seidlitz +1
We investigate the colour-magnitude relation of metal-poor globular clusters, the 'blue tilt', in the Hydra and Centaurus galaxy clusters and constrain the primordial conditions fo…
The globular cluster system of NGC1316. III. Kinematic complexity
Tom Richtler, Michael Hilker, Brijesh Kumar +3
The merger remnant NGC 1316 (Fornax A) is one of the most important objects regarding the investigation of merger-related processes. We use kinematical data of globular clusters (G…
Direct -body simulations of globular clusters - II. Palomar 4
Akram Hasani Zonoozi, Hosein Haghi, Andreas H. W. Kuepper +3
We use direct -body calculations to study the evolution of the unusually extended outer halo globular cluster Palomar 4 (Pal~4) over its entire lifetime in order to reproduce it…