Close visual binaries. III - Parameters and evolutionary status

Details Close visual binaries. III - Parameters and evolutionary status Close visual binaries. III - Parameters and evolutionary status

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1887c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 89, Dec. 1984, p. 1887-1896.

Astronomy and Astrophysics

Astronomy

3

Binary Stars, Stellar Evolution, Stellar Spectrophotometry, Blue Stars, Horizontal Branch Stars, Parameterization, Peculiar Stars, Pre-Main Sequence Stars, Visual Photometry

Scientific paper

New Yale isochrones, which have been tested for accuracy by Corbally (1984), provide the means to investigate interesting visual binaries, especially those whose classifications and photometry do not match well. Various parameters are deduced for those binaries which fitted the isochrones (e.g. ages, metal abundances, luminosities of peculiar stars); various solutions are systematically developed for those which did not fit; and a likely status of evolution is proposed (e.g., duplicity of the components, premain-sequence, blue straggler, horizontal branch, optical pair, data inaccuracies). Evolution around the helium flash and diffusion theory are briefly considered. These parameters and statuses provide a wealth of new stellar data and suggestions for further investigation.

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