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- W1969239642 abstract "view Abstract Citations (27) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Molecular column densities in selected model atmospheres Johnson, H. R. ; Sneden, C. ; Beebe, R. F. Abstract Molecular column densities are presented for 35 molecules in a variety of cool stellar model atmospheres. From an examination of the predicted column densities, we draw the following conclusions: (1) OH might be visible in carbon stars which have been generated from triplet-alpha burning, but will be absent from carbon stars generated from the CNO bi-cycle; (2) the TiO/ZrO ratio shows small but interesting variations as C/O is changed and as the effective temperature is changed; (3) the column density of silicon dicarbide (SiC2) is sensitive to abundance, temperature, and gravity; hence, all relationships between the strength of SiC2 and other stellar parameters will show appreciable scatter. There is, however, a substantial luminosity effect present in the SiC2 column densities; (4) unexpectedly, SiC2 is anticorrelated with C2; (5) the presence of SiC2 in a carbon star allows us to eliminate the possibility that these stars are both 'hot' (Teff greater than or equal to 3000 K) and have been produced through the CNO bi-cycle (so that C/H is less than solar). Publication: The Astrophysical Journal Supplement Series Pub Date: April 1975 DOI: 10.1086/190337 Bibcode: 1975ApJS...29..123J Keywords: Astronomical Models; Atmospheric Density; Atmospheric Models; Late Stars; Nuclear Fusion; Stellar Atmospheres; Abundance; Hydroxyl Compounds; Silicon Carbides; Spectrum Analysis; Stellar Luminosity; Stellar Spectra; Astrophysics full text sources ADS |" @default.
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- W1969239642 date "1975-04-01" @default.
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- W1969239642 title "Molecular column densities in selected model atmospheres" @default.
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