AN ENHANCED SPECTROSCOPIC CENSUS OF THE ORION NEBULA CLUSTER

@article{Hillenbrand2013ANES,
  title={AN ENHANCED SPECTROSCOPIC CENSUS OF THE ORION NEBULA CLUSTER},
  author={L. A. Hillenbrand and Aaron S. Hoffer and Gregory J. Herczeg},
  journal={The Astronomical Journal},
  year={2013},
  volume={146}
}
We report new spectral types or spectral classification constraints for over 600 stars in the Orion Nebula Cluster (ONC) based on medium resolution (R ≈ 1500–2000) red optical spectra acquired using the Palomar 200′′ and Kitt Peak 3.5 m telescopes. Spectral types were initially estimated for F, G, and early K stars from atomic line indices while for late K and M stars, which constitute the majority of our sample, indices involving TiO and VO bands were used. To ensure proper classification… 
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