Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101.1121e&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, Dec. 1989, p. 1121-1125.
Astronomy and Astrophysics
Astronomy
3
Infrared Astronomy, Metallicity, Stellar Atmospheres, Subdwarf Stars, Astronomical Models, Flux Density, Spectral Energy Distribution, Stellar Magnitude, Visible Spectrum
Scientific paper
Infrared observations of four metal-poor subdwarfs have been compared with the predictions of model stellar atmospheres. The parameters of the models were established by fitting observed and calculated spectral energy distributions at visible wavelengths. The models were used to calculate J, H, K, and L-prime apparent magnitudes for the subdwarfs. When compared with observation, it was fount that, while the subdwarf models were internally consistent at the 1-percent level of better, there are systematic deviations relative to Vega in excess of 0.1 mag. These effects are far greater than would be expected from the excellent fits of the models, for both Vega and the subdwarfs, at shorter wavelengths. Various explanations are suggested for this effect.
Bell Ray
Elias Johnathan H.
Matthews Keith
Neugebauer Gernot
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