Hα and the Ca II H and K lines as activity proxies for late-type stars
Context. The main chromospheric activity indicator is the S index, which is the ratio of the flux in the core of the Ca II H and K lines to the continuum nearby, and is well studied for stars from F to K. Another chromospheric proxy is the Ha line, which is believed to be tightly correlated with the...
Guardado en:
| Autores principales: | Cincunegui, C., Díaz, R.F., Mauas, P.J.D. |
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| Formato: | JOUR |
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00046361_v469_n1_p309_Cincunegui |
| Aporte de: |
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