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The Photometry of Visual Binaries

Published online by Cambridge University Press:  14 August 2017

R. H. Hardie
R. H. Hardie*
Affiliation:
Dyer Observatory, Nashville, Tennessee

Extract

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A substantial part of our understanding of the physical nature of stars rests upon observations of visual binaries. In order to secure a complete interpretation of a binary system we require these data: semi-major axis, parallax, period, magnitudes, colours, spectral types and velocities. It goes without saying that for very few systems are all these desiderata available, largely through technical difficulties of observing two images in close proximity to one another - and these difficulties are particularly serious in carrying out photometry. Nevertheless, the usefulness of photometry of binaries is so great that no effort should be spared in resolving the observational and technical problems.

Type
Session 4. Photometric and Spectroscopic Data
Information
International Astronomical Union Colloquium , Volume 18: Orbital and physical parameters or double stars , 1973 , pp. 68 - 72
Copyright
Copyright © The University of Toronto Press, Royal Astronomical society of Canada 1973

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