Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-01-22
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
22 pages, 2 figures. Submitted to Phys. Rev. D
Scientific paper
The high accuracy of modern space astrometry requires the use of General Relativity to model the propagation of stellar light through the gravitational field encountered from a source to a given observer inside the Solar System. In this sense relativistic astrometry is part of fundamental physics. The general relativistic definition of astrometric measurement needs an appropriate use of the concept of reference frame, which should then be linked to the conventions of the IAU Resolutions (2000), which fix the celestial coordinate system. A consistent definition of the astrometric observables in the context of General Relativity is also essential to find uniquely the stellar coordinates and proper motion, this being the main physical task of the inverse ray tracing problem. Aim of this work is to set the level of reciprocal consistency of two relativistic models, GREM and RAMOD (Gaia, ESA mission), in order to garantee a physically correct definition of light direction to a star, an essential item for deducing the star coordinates and proper motion within the same level of measurement accuracy.
Crosta Mariateresa
Vecchiato Alberto
No associations
LandOfFree
Physical Reference Frames and Astrometric Measurements of Star Direction in General Relativity \\I. Stellar Aberration does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Physical Reference Frames and Astrometric Measurements of Star Direction in General Relativity \\I. Stellar Aberration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Physical Reference Frames and Astrometric Measurements of Star Direction in General Relativity \\I. Stellar Aberration will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-189940