Some aspects of Relativistic Astrometry from within the Solar System

Details Some aspects of Relativistic Astrometry from within the Solar System Some aspects of Relativistic Astrometry from within the Solar System

2003-05-21

arxiv.org/abs/astro-ph/0305399v1

CelestialMech.87:209-218,2003

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures, accepted by Cel. Mec

Scientific paper

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.

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