Relativistic satellite astrometry at μarcsec precision and the measurement of the stellar aberration
Dipartimento di Fisica “Galileo Galilei”, Università degli Studi di Padova, Italy
2 INFN – Sezione di Padova, Italy e-mail: [giovanni.preti;fernando.defelice]@pd.infn.it
Accepted: 11 February 2010
Analysis and interpretation of the μarcsec precision astrometric data shortly to be provided by the ESA-GAIA satellite has prompted the development of a fully general-Relativistic Astrometric MODel (RAMOD), which is able to account for all the general-relativistic corrections up to the required order of precision . We obtain the covariant expression for the general relativistic aberration effect and provide the analytical module for determining the stellar aberration from the GAIA observables (the direction cosines of the incoming light-ray trajectory) at this same order of precision.
Key words: gravitation / relativity / methods: analytical / astrometry / reference systems
© ESO, 2010