Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.178..383w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 178, Feb. 1977, p. 383-394.
Astronomy and Astrophysics
Astronomy
33
Astronomical Catalogs, Infrared Astronomy, Red Giant Stars, Stellar Luminosity, Stellar Spectra, Abundance, Carbon Stars, Chemical Composition, Classifications, Stellar Magnitude, Stellar Models, Titanium Oxides, Zirconium Oxides
Scientific paper
Lists of the brightest stars of type S at infrared wavelengths, based on searches in the IRC and AFCRL catalogs, are presented in the hope of stimulating further spectroscopic observations of S stars in the infrared; the importance of such observations is stressed. An examination of the K magnitudes of the brightest stars having various degrees of S characteristics shows that the marginal MS stars are more common than stars with strong S characteristics, although they are also more difficult to recognize. It is found that the number ratio of cool carbon stars to S stars, when selected in the same way according to infrared magnitude and region of the sky, is about 3:1.
Wing Robert F.
Yorka Sandra B.
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