Some aspects of Relativistic Astrometry from within the Solar System

Abstract

In this article we outline the structure of a general relativistic astrometric model which has been developed to deduce the position and proper motion of stars from 1-microarcsecond optical observations made by an astrometric satellite orbiting around the Sun. The basic assumption of our model is that the Solar System is the only source of gravity, hence we show how we modeled the satellite observations in a many-body perturbative approach limiting ourselves to the order of accuracy of $(v/c{)}^2$. The microarcsecond observing scenario outlined is that for the GAIA astrometric mission.

11 pages, 2 figures, accepted by Cel. Mec

References in corpus (7)

• GAIA: Composition, Formation and Evolution of the Galaxy
• Violations of the equivalence principle in a dilaton-runaway scenario
• Runaway dilaton and equivalence principle violations
• Gravitomagnetic Effects in the Propagation of Electromagnetic Waves in Variable Gravitational Fields of Arbitrary-Moving and Spinning Bodies
• Astrometric Microlensing with the GAIA satellite
• Testing general relativity by micro-arcsecond global astrometry
• Testing Relativistic Effect of Propagation of Gravity by Very-Long Baseline Interferometry

Cited by in corpus (3)

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• Detection and Characterization of Planetary Systems with $\mu$as Astrometry
• The Erez-Rosen metric and the role of the quadrupole on light propagation