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| Paper: |
Extraction of Sub-Milliarcsecond Parallaxes from Hipparcos Data |
| Volume: |
338, Astrometry in the Age of the Next Generation of Large Telescopes |
| Page: |
232 |
| Authors: |
Heacox, W.D. |
| Abstract: |
The precision of astrometric measurements can, in some cases, be greatly enhanced by incorporation of reliable additional information in a Bayesian formulation. This paper reports an apparently successful such application to Delta Cepheid variables observed with Hipparcos: incorporation of a standard kinematic model reduces the parallax inference error by about a factor of 3, with no apparent bias; allowing reliable inference of Cepheid luminosities and the elimination of formal probabilities of negative parallax. |
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