Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-04
Astrophys.J.653:1552-1565,2006
Astronomy and Astrophysics
Astrophysics
40 pages, 5 figures. Accepted for publication on The Astrophysical Journal. Manuscript prepared with AASLaTeX macros v.5.2
Scientific paper
10.1086/508701
Modern astrometry is based on angular measurements at the micro-arcsecond level. At this accuracy a fully general relativistic treatment of the data reduction is required. This paper concludes a series of articles dedicated to the problem of relativistic light propagation, presenting the final microarcsecond version of a relativistic astrometric model which enable us to trace back the light path to its emitting source throughout the non-stationary gravity field of the moving bodies in the Solar System. The previous model is used as test-bed for numerical comparisons to the present one. Here we also test different versions of the computer code implementing the model at different levels of complexity to start exploring the best trade-off between numerical efficiency and the micro-arcsecond accuracy needed to be reached.
Bucciarelli Beatrice
Crosta Maria Teresa
de Felice Fernando
Lattanzi Mario G.
Vecchiato Alberto
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