Physics
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277..738n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 15, 1984, p. 738-743.
Physics
39
Late Stars, Main Sequence Stars, Stellar Models, Helium, Opacity, Variable Stars
Scientific paper
Main-sequence models for stars of 0.15-0.55 solar mass have been calculated. While the assumptions and numerical techniques employed were conventional, special attention was given to certain elements of the constitutive physics, in particular, molecular opacities. A high standard of numerical accuracy was maintained, so that the sensitivity of the results to various uncertainties could be accurately determined. Using this information, as well as comparisons with previous calculations, rough estimates of the reliability of the models are made. It is shown that the uncertainties are significant and that direct comparisons with published observations of individual stars do little to alleviate the uncertainties. An alternative test, based on observations of cataclysmic variables, is discussed.
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