A Preliminary Survey of Collapsed Cores in Globular Clusters

  title={A Preliminary Survey of Collapsed Cores in Globular Clusters},
  author={S. George Djorgovski and Ivan R. King},
  journal={The Astrophysical Journal},
This is a preliminary report on surface photometry of the major fraction of known globular clusters, to see which of them show the signs of a collapsed core. More than 20 examples, or one-fifth of the total, are found. Core classifications are given for all clusters examined. The fraction of collapsed-core clusters may be an index of how long a cluster takes to reexpand after collapse. 21 references. 

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