Light Deflection for relativistic space astrometry in closed form

Details Light Deflection for relativistic space astrometry in closed form Light Deflection for relativistic space astrometry in closed form

2011-11-05

arxiv.org/abs/1111.1325v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

proceedings of Great-ESF workshop, June 2011, Porto, Portugal

Scientific paper

Given the extreme accuracy reached by future global space astrometry, one needs a global relativistic modeling of observations. A relativistic definition of astrometric observables is then essential to find uniquely coordinates, parallax and proper motion of a stellar object. The standard procedure is to explicitly solve the null geodesic equations to describe the trajectory of a photon emitted by a celestial object and received by a moving observing satellite. However, this task can be avoided if one builds an astrometric set up using the recent formalism of time transfer functions.

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