Corpus ID: 119089527

omega Centauri - a former nucleus of a dissolved dwarf galaxy? New evidence from Stroemgren photometry

@article{Hilker2000omegaC,
  title={omega Centauri - a former nucleus of a dissolved dwarf galaxy? New evidence from Stroemgren photometry},
  author={Michael Hilker and Tom Richtler P. Univ. Catolica and Santiago and Chile. and Universidad de Concepcion},
  journal={arXiv: Astrophysics},
  year={2000}
}
CCD vby Stroemgren photometry of a statistically complete sample of red giants and stars in the main sequence turn-off region in omega Centauri has been used to analyse the apparently complex star formation history of this cluster. From the location of stars in the (b-y),m_1 diagram metallicities have been determined. These have been used to estimate ages of different sub-populations in the color-magnitude diagram. The metal-poor population around -1.7 dex is the oldest population found. More… Expand
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