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Duplicity amongst HIPPARCOS stars
Author(s) -
Brosche P.,
Odenkirchen M.,
Tucholke H.J.
Publication year - 1995
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2103160110
Subject(s) - astrometry , stars , physics , proper motion , astrophysics , astronomy , satellite , orbital motion , monte carlo method , motion (physics) , orbital elements , classical mechanics , angular momentum , statistics , mathematics
Stars observed by the astrometry satellite Hipparcos may be unknown double stars. A subsample of those are dangerous for the extragalactic link of Hipparcos proper motions by long‐term photographic proper motions, if the time base of Hipparcos is too short to detect the orbital motion. The probability of these cases and the typical size of the photocentric orbital motion are estimated by Monte Carlo simulations for the sample of 33 stars used in the Bonn extragalactic link. Both are found to be considerable: about 16% and 9 mas/yr respectively.