A possible width-luminosity correlation of the CA II K1 and MG II k1 features

Details A possible width-luminosity correlation of the CA II K1 and MG II k1 features A possible width-luminosity correlation of the CA II K1 and MG II k1 features

Feb 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...195l.121a&link_type=abstract

Astrophysical Journal, vol. 195, Feb. 1, 1975, pt. 2, p. L121-L124.

Astronomy and Astrophysics

Astrophysics

39

K Lines, Late Stars, Spectral Line Width, Stellar Atmospheres, Stellar Luminosity, Stellar Spectra, Calcium, Magnesium, Metal Ions, Resonance, Supergiant Stars

Scientific paper

Existing high resolution stellar profiles of the Ca II and Mg II resonance lines suggest a possible width-luminosity correlation of the K1 minimum features. It is shown that such a correlation can be simply understood if the continuum optical depth of the stellar temperature minimum is relatively independent of surface gravity as suggested by three stars studied in detail.

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