Astronomy:Calcium triplet
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Short description: Three ionised calcium spectral lines at 8498 Å, 8542 Å 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
References
- ↑ Polidan, R. S. (1976). "On the Detection of Binary be Stars". Be and Shell Stars: IAU Symposium No. 70 70: 405. Bibcode: 1976IAUS...70..401P. http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1976IAUS...70..401P&defaultprint=YES&filetype=.pdf.
- ↑ Andretta; Busà; Gomez; Terranegra (2005). "The Ca II Infrared Triplet as a stellar activity diagnostic". Astronomy & Astrophysics. p. 669. http://www.aanda.org/articles/aa/pdf/2005/05/aa1745.pdf.
- ↑ Jonathan Tennyson (2005). "Astronomical Spectroscopy. An introduction to the atomic and molecular physics in astronomical spectra". Imperial College Press. p. 94. http://www.ursusmajor.ch/downloads/analysis-and-interpretation-of-astronomical-sp.pdf.
- ↑ 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". Astronomy & Astrophysics. p. 535, A106. https://ui.adsabs.harvard.edu/link_gateway/2011A%26A...535A.106K/PUB_HTML.
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