A NIR spectral sequence of O-type supergiants
The study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars was revisited and a new set of spectral standard stars was proposed for all sub-types between 02 and BO and for all luminosity classes. We are wor...
Guardado en:
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2021
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/166335 |
| Aporte de: |
| Sumario: | The study of spectral morphology is a powerful tool for understanding the fundamental properties of stars. The spectral classification scheme for O stars was revisited and a new set of spectral standard stars was proposed for all sub-types between 02 and BO and for all luminosity classes. We are working on the construction of a spectral atlas with high quality observations between 0.85 — 2.5 pm. Observations for this project have begun seven years ago, and they are carried out with the GNIRS (Gemini Observatory) and FIRE (Las Campanas Observatory) spectrographs. We present here a second batch of results, including the spectra of a complete temperature sequence of supergiant standard stars in the J, H and A'-bands. The analysis of this data set implies that it is possible to define spectral classification criteria using the He I and He π lines present in it. |
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