Line blocking in the visual and near infrared spectra of G-, K- and M-type giants

Astronomy and Astrophysics – Astrophysics

Scientific paper

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G Stars, Giant Stars, Infrared Spectra, K Stars, Line Spectra, M Stars, Stellar Spectra, Astronomical Models, Atmospheric Models, Near Infrared Radiation, Solar Spectra

Scientific paper

Line-blocking coefficients (percentage of light absorbed by spectral lines), partly covering the wavelength range from 5200 to 8700 A, are given for 50 giant stars with spectral types between G8 and M3. An estimate of the accuracy of these data indicates a possible under-estimate by about two per cent. A comparison is made with available theoretical data. It appears that theoretical line blocking, based on line statistics from the solar spectrum, is deficient throughout the major part of the wavelength interval studied.

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