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Astrometric observable and relativistic astrometric catalogues

Published online by Cambridge University Press:  30 September 2008

A. Oscoz ,
E. Mediavilla ,
M. Serra-Ricart ,
M.T. Crosta ,
B. Bucciarelli ,
F. de Felice ,
M.G. Lattanzi  and
A. Vecchiato
M.T. Crosta
Affiliation:
INAF-OATo, Strada Osservatorio 20, Pino Torinese, Torino, Italy
B. Bucciarelli
Affiliation:
INAF-OATo, Strada Osservatorio 20, Pino Torinese, Torino, Italy
F. de Felice
Affiliation:
University “G. Galileo”, Dept. of Physics, via Marzolo 8, Padova, Italy
M.G. Lattanzi
Affiliation:
INAF-OATo, Strada Osservatorio 20, Pino Torinese, Torino, Italy
A. Vecchiato
Affiliation:
INAF-OATo, Strada Osservatorio 20, Pino Torinese, Torino, Italy
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Abstract

We describe a way to compare current relativistic astrometric models accurate to the micro-arcsecond level from which an astrometric catalogue will be deduced. The observed stellar direction can be written as a function of several parts, linking the astrometric observables to the relativistic effects associated to the stellar kinematical properties and distances as seen inside the gravitational field of our Solar System, i.e. the so called relativistic astrometric parameters, providing a tool for comparing the RAMOD framework to the pM/pN approaches.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 30: Spanish Relativity Meeting - Encuentros Relativistas Españoles , ERE2007: Relativistic Astrophysics and Cosmology , 2008 , pp. 345 - 348
Copyright
© EAS, EDP Sciences, 2008

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References

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