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Speaker |
Crosta, Mariateresa |
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Coauthors |
Crosta, M.; Vecchiato, A.; de Felice, F.; Lattanzi, M.G. |
| Talk Title |
RELATIVISTIC LIGHT TRACING IN THE GAIA ERA |
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Abstract |
Mission like Gaia (ESA, launched on December 19, 2013) requires to treat gravity properly when compiling stellar positions and proper motions. In this talk we present the analytical solution for light propagation conceived to suit the accuracy achievable by Gaia consistently with the measurement protocol in General Relativity as adopted within the RAMOD framework. Aim of RAMOD is to provide a general relativistic tools for the science exploitation of such a revolutionary mission, whose main goal is to trace back star directions from within our local curved space-time, therefore providing a three-dimensional map of our Galaxy. The results are useful for a thorough comparison and cross-checking validation of what already exists in the field of Relativistic Astrometry. Moreover, the method of measurements in GR introduced by RAMOD extends beyond the scope of Gaia: the analytical solutions can be applied to other measurements that require the same order of accuracy as that one expected for Gaia. |
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