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Hertzsprung-Russell Diagrams and Color-Luminosity Diagrams for the Stars Nearer than Twenty-Two Parsecs
Published online by Cambridge University Press: 14 August 2015
Extract
Observational data for stars in the solar neighborhood received before January 1969 were included in the Catalogue of Nearby Stars (Gliese, 1969) which contains more than 1800 objects, single stars and components of binaries, nearer than 22 pc. Since then more than 8 years have gone by and many new data have been published, especially new trigonometric parallaxes as well as photometric distance determinations. Today we know more than 2000 stars with parallaxes measured to be greater than 0m.044. But many of these distances are still very uncertain and for a considerable number of objects, especially the faint ones, spectral classificiation is lacking or the photometry is still not satisfactory.
- Type
- Part II: HR Diagrams, the Solar Neighborhood
- Information
- Copyright
- Copyright © Reidel 1978