Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.177...97b&link_type=abstract
In ESA The Sci. Aspects of the Hipparcos Space Astrometry Mission p 97-100 (SEE N82-30146 20-88)
Astronomy and Astrophysics
Astronomy
Astrometry, European Space Programs, Star Distribution, Stellar Parallax, Binary Stars, Open Clusters, Stellar Luminosity, Stellar Magnitude, Stellar Mass, Stellar Spectra
Scientific paper
The inventory of the stellar population within 100 parsec, brighter than apparent magnitude V = 11.0 is used to estimate the numbers of stars of various absolute magnitudes and spectral types in distance shells. How the Hipparcos parallax program for these stars provides a base for the calibration of luminosity criteria, for studies of the fine structure in the color-luminosity diagram, and for the use of highly accurate luminosities of individual stars is shown. Open clusters within reach of the parallax program and the determination of accurate stellar masses from visual double stars are discussed.
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