Astronomy and Astrophysics – Astronomy
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.177..161d&link_type=abstract
In ESA The Sci. Aspects of the Hipparcos Space Astrometry Mission p 161-164 (SEE N82-30146 20-88)
Astronomy and Astrophysics
Astronomy
2
Astrometry, Binary Stars, Esa Satellites, Satellite Observation, Astronomical Catalogs, Experiment Design, Stellar Evolution, Stellar Mass, Stellar Motions, Stellar Parallax
Scientific paper
The inclusion of binary stars in the Hipparcos input catalog, given the criterion that candidates must have a perfectly symmetrical circular image, is discussed. Many binaries have component separation which allow them to be systematically observed without disturbing the main project. Only those with separations between 5 and 20 arcsec need be rejected. Total mass of visual orbital pairs can be determined with an accuracy on the order of + or - 25% for 174 objects, using Hipparcos parallaxes. Knowledge on the genesis and evolution of binaries can be obtained from the parallaxes of nonorbital visual pairs. Proper motions of close pairs and visual orbital pairs can be used to study galactic formation and evolution.
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