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Binarity of Hipparcos Main Sequence Survey Stars
Carl F. Quist, Lennart Lindegren
Journal:

Symposium - International Astronomical Union / Volume 200 / 2001

Published online by Cambridge University Press:

13 May 2016, pp. 64-68

Print publication:

2001
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Hipparcos observations of double stars, mainly A and F primaries, are modelled in order to check the statistics of double-star solutions in the Hipparcos Catalogue and to set quantitative limits on binary distributions. The number of companions per primary is estimated to 0.25 ± 0.05 for semi-major axes from 1 to 10 AU, and to 0.43 ± 0.20 for the range 10–100 AU. The total multiplicity found is between 0.9 and 1.2.