This paper presents α (16), α (35), Γ (9) and Γ (16) indices for twenty O-type stars and three T Tauri-like objects. It is confirmed that Hα is an excellent luminosity indicator of the O star's luminosity. The multiplet neutral oxygen lines at λ7774Å for O-type stars, on the average, have the same strength as in the Sun. Hα and OI for T Tauri-like objects may be contaminated by emission, and probably they also vary with time. Hence, their use as luminosity criteria may not be adequate in many cases.
Revista Mexicana de Astronomia y Astrofisica
- Pub Date:
- August 1976