Calcium triplet
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Three ionised calcium spectral lines at 8498, 8542, and 8662 Å
The infrared Ca II triplet, commonly known as the calcium triplet, is a triplet of three ionised calcium spectral lines at the wavelengths of 8498 Å, 8542 Å and 8662 Å (measured in air). The triplet has a strong emission,[1] and is most prominently observed in the absorption of spectral type G, K and M stars.[2] [3] [4]
See also
[edit ]References
[edit ]- ↑ Polidan, R. S. (1976). "On the Detection of Binary be Stars" (PDF). Be and Shell Stars: IAU Symposium No. 70. 70: 405. Bibcode:1976IAUS...70..401P.
- ↑ Andretta; Busà; Gomez; Terranegra (2005). "The Ca II Infrared Triplet as a stellar activity diagnostic" (PDF). Astronomy & Astrophysics. p. 669.
- ↑ Jonathan Tennyson (2005). "Astronomical Spectroscopy. An introduction to the atomic and molecular physics in astronomical spectra" (PDF). Imperial College Press. p. 94. Archived from the original (PDF) on 2016年01月16日. Retrieved 2016年07月09日.
- ↑ G. Kordopatis, A. Recio-Blanco, P. de Laverny, A. Bijaoui, V. Hill, G. Gilmore, R. F. G. Wyse and C. Ordenovic (2011). "Automatic stellar spectra parameterisation in the IR Ca ii triplet region" (PDF). Astronomy & Astrophysics. p. 535, A106. Archived from the original on 2011年11月21日.
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