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- Title
Classical T Tauri Stars and Substellar Analogs.
- Authors
Navascués, D. Barrado Y; Martín, E.L.; Jayawardhana, R.; Mohanty, S.
- Abstract
We propose a spectroscopic criterion based on Hα equivalent width and spectral type to classify classical T Tauri stars and substellar analogs. We argue that accreting objects can be identified from low-resolution optical spectroscopy, when their Hα flux is stronger than the saturation limit at Log {Lum(Hα)/Lum(bol)} = -3.3. Additional criteria, such as the relation between HeI5876 or HeI6678 and Hα, or the ratios between the components of the CaII infrared triplet, are also discussed. We have tested the reliability of these criteria by applying them to several objects with masses in the range 0.11–0.025 M⊙, which belong to nearby star forming regions and the TW Hya association.
- Subjects
STELLAR T-associations; T Tauri stars; STELLAR spectra; EARLY stars; VARIABLE stars; SPECTRUM analysis
- Publication
Astrophysics & Space Science, 2004, Vol 292, Issue 1-4, p665
- ISSN
0004-640X
- Publication type
Article