The Russell-Moore discordant parallax stars.

Abstract

view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Russell-Moore discordant parallax stars. Hynek, J. A. Abstract The discordance between the trigonometric and spectroscopic parallaxes of 52 giant binary pairs first pointed out by Russell and Moore1 is found to remain when the study is extended to additional visual pairs and to 47 spectroscopic binaries. A similar discordance is observed between the dynamic and spectroscopic parallaxes of 103 pairs, thus corroborating the trigonometric results. The failure of the mass-luminosity law for, at least, the brighter members of giant binary stars is strongly indicated. The evidence presented by all three types of parallax is consistent with the hypothesis that, as a class, the binary stars of the giant sequence are more than a magnitude brighter than normal giants, of nearly twice their radius, and of more than twice their mass. Excessive mass is indicated both by spectroscopic evidence and by direct determination by the usual double star method. There is some possibility that these stars are members of "population II." I.Masses of the Stars, p. 6o, 1940. Emerson MeMillin Observatory, Cleveland, Ohio Publication: The Astronomical Journal Pub Date: October 1948 DOI: 10.1086/106184 Bibcode: 1948AJ.....54...40H full text sources ADS |