Observations of H. cap alpha. -emission stars in the young cluster NGC 2264
UBVRI photometry is given for a sample of 25 late-type H..cap alpha..-emission stars in the young cluster NGC 2264. The stars are in the magnitude range 12< or =V<16. Some but not all appear to be T Tauri stars. The color--color diagrams support the view that the deviations from normal photospheric colors (due to ''spectral veiling'' and line emission) decrease with increasing wavelength between the U and I filters. In the (V, V-R) diagram, the H..cap alpha..-emission stars lie in a well-defined pre-main-sequence band. Within this sample, there is a trend toward stronger line emission and spectral veiling with later spectral type. All of the likely legitimate T Tauri stars have inferred spectral types later than about K3. The question of cluster membership for stars in the cluster field with very small proper motions is considered.
- Research Organization:
- Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181
- OSTI ID:
- 6536310
- Journal Information:
- Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:1; ISSN ANJOA
- Country of Publication:
- United States
- Language:
- English
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