Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..138l&link_type=abstract
Astrophysical Journal, Part 1, vol. 226, Nov. 15, 1978, p. 138-143.
Astronomy and Astrophysics
Astrophysics
5
Astrometry, Eclipsing Binary Stars, Star Clusters, Brightness, Main Sequence Stars, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
Distance moduli are computed for three eclipsing binaries known to be members of galactic clusters and associations: CW Cep, V453 Cyg, and AG Per. The distance moduli are computed from the well-determined absolute dimensions, magnitudes, and colors of the components by using a surface-brightness relation (the Barnes-Evans relation) based on observed stellar angular diameters. Comparison with existing distance moduli obtained by the cluster-fitting technique implies that the two independent distance scales differ systematically by less than 0.10 mag for early-type stars. No strong conclusion about the proposed revision of the Hyades distance modulus can be drawn, however, because of the size of expected errors in the splicing of early-type cluster main sequences to that of the Hyades.
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