An Extended Star Formation History in an Ultra Compact Dwarf

@article{Norris2015AnES,
  title={An Extended Star Formation History in an Ultra Compact Dwarf},
  author={Mark A. Norris and Carlos G. Escudero and Favio Ra{\'u}l Faifer and Sheila J. Kannappan and Juan Carlos Forte and Remco van den Bosch},
  journal={arXiv: Astrophysics of Galaxies},
  year={2015}
}
There has been significant controversy over the mechanisms responsible for forming compact stellar systems like ultra compact dwarfs (UCDs), with suggestions that UCDs are simply the high mass extension of the globular cluster (GC) population, or alternatively, the liberated nuclei of galaxies tidally stripped by larger companions. Definitive examples of UCDs formed by either route have been difficult to find, with only a handful of persuasive examples of stripped-nucleus type UCDs being known… 

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