Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..817l&link_type=abstract
Astrophysical Journal, Part 1, vol. 228, Mar. 15, 1979, p. 817-827.
Astronomy and Astrophysics
Astrophysics
54
Abundance, Eclipsing Binary Stars, Interstellar Extinction, Stellar Magnitude, Stellar Mass, Helium, Hydrogen, Mass Ratios, Radii, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
Distances to, and absolute magnitudes of, 96 components of eclipsing binaries with well-determined absolute dimensions have been computed using V-R photometry. The calculations take into account interstellar reddening, which is estimated from existing UBV and uvby-beta photometry, as well as photometric proximity effects. The resulting absolute magnitudes, dimensions, and masses are compared with zero-age main sequences predicted by theory. Theory is in good agreement with the observed data for stars more massive than the sun if a composition (X, Y, Z) = (0.66 + or - 0.03, 0.303 + or - 0.03, 0.037 + or - 0.005) is chosen. The corresponding helium-to-hydrogen number ratio is 0.115 + or - 0.02, in agreement with previous estimates.
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