The nature of UCDs: Internal dynamics from an expanded sample and homogeneous database

Context. The internal dynamics of ultra-compact dwarf galaxies (UCDs) has attracted increasing attention, with most of the UCDs studied to date located in the Virgo cluster. Aims. Our aim is to perform a comprehensive census of the internal dynamics of UCDs in the Fornax cluster, and to shed light o...

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Published in:Astronomy and astrophysics (Berlin) 2008-09, Vol.487 (3), p.921-935
Main Authors: Mieske, S., Hilker, M., Jordán, A., Infante, L., Kissler-Patig, M., Rejkuba, M., Richtler, T., Côté, P., Baumgardt, H., West, M. J., Ferrarese, L., Peng, E. W.
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
galaxies: clusters: individual: Fornax
galaxies: dwarf
galaxies: fundamental parameters
galaxies: nuclei
galaxies: star clusters
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Summary:Context. The internal dynamics of ultra-compact dwarf galaxies (UCDs) has attracted increasing attention, with most of the UCDs studied to date located in the Virgo cluster. Aims. Our aim is to perform a comprehensive census of the internal dynamics of UCDs in the Fornax cluster, and to shed light on the nature of the interface between star clusters and galaxies. Methods. We obtained high-resolution spectra of 23 Fornax UCDs with –$10.4>M_V>-13.5$ mag ($10^6
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:200810077