CORE–HALO AGE GRADIENTS AND STAR FORMATION IN THE ORION NEBULA AND NGC 2024 YOUNG STELLAR CLUSTERS

@article{Getman2014COREHALOAG,
  title={CORE–HALO AGE GRADIENTS AND STAR FORMATION IN THE ORION NEBULA AND NGC 2024 YOUNG STELLAR CLUSTERS},
  author={Konstantin V. Getman and Eric D. Feigelson and Michael A. Kuhn},
  journal={The Astrophysical Journal},
  year={2014},
  volume={787},
  url={https://api.semanticscholar.org/CorpusID:118503957}
}
We analyze age distributions of two nearby rich stellar clusters, the NGC 2024 (Flame Nebula) and Orion Nebula cluster (ONC) in the Orion molecular cloud complex. Our analysis is based on samples from the MYStIX survey and a new estimator of pre-main sequence (PMS) stellar ages, AgeJX, derived from X-ray and near-infrared photometric data. To overcome the problem of uncertain individual ages and large spreads of age distributions for entire clusters, we compute median ages and their confidence… 
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