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| Paper: |
Revisiting Hipparcos parallaxes of nearby stars using Tycho observations |
| Volume: |
167, Harmonizing Cosmic Distance Scales in a Post-Hipparcos Era |
| Page: |
267 |
| Authors: |
Makarov, V. V.; Fabricius, C. |
| Abstract: |
We consider a sample of candidate nearby (π > 40~mas) stars which were observed by Hipparcos but obtained poor or wrong solutions. The solution usually failed for double or multiple systems with orbital motion, when the configuration of the components and their position was not known well enough for the epoch of observation. It is pointed out that the results of an ongoing reprocessing of Tycho observations (Tycho-2) in many cases provide the vital information which enables correct solution utilizing the published Hipparcos transit data. Several revised solutions are given. We consider also known or candidate bright nearby stars missed by Hipparcos. For them accurate two colour photometry and proper motions will be obtained routinely. Finally, a search for new candidate nearby and high proper motion stars brighter than V=12 mag is being undertaken. |
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