Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...96..593l&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 96, no. 3, p. 593-612.
Astronomy and Astrophysics
Astrophysics
121
Active Galaxies, Hertzsprung-Russell Diagram, Infrared Spectra, Near Infrared Radiation, Star Formation, Stellar Luminosity, Stellar Spectra, Carbon Monoxide, Dwarf Stars, Giant Stars, Metallicity, Supergiant Stars, Water Vapor
Scientific paper
We present a library of 56 stellar spectra from 1.428 to 2.5 microns, sampling the Hertzsprung-Russell diagram in luminosity class and effective temperature. Relative fluxes defining the stellar energy distributions throughout the H and K atmospheric windows, an infrared color temperature used to set a continuum for equivalent width measurements, and relations between various spectral signatures, color temperatures and gravity are determined. H2O is the dominant absorber in the latest M giant stars. Its absorption is measured in both wings of the signature around 1.9 micron and a combined effect of H2O and H(-) opacity is measured shortward of 1.6 micron. The CO equivalent width longward of 2.29 microns increases with decreasing gravity and temperature. CO and the OH radical are responsible for numerous absorption bands below 1.8 micron.
Lancon Ariane
Rocca-Volmerange Brigitte
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