Testing general relativity by micro-arcsecond global astrometry

  title={Testing general relativity by micro-arcsecond global astrometry},
  author={Alberto Vecchiato and Mario Gilberto Lattanzi and Beatrice Bucciarelli and Mariateresa Crosta and Fernando de Felice and Mario Gai},
  journal={Astronomy and Astrophysics},
The global astrometric observations of a GAIA-like satellite were modeled within the PPN formulation of Post- Newtonian gravitation. An extensive experimental campaign based on realistic end-to-end simulations was conducted to estab- lish the sensitivity of global astrometry to the PPN parameter γ, which measures the amount of space curvature produced by unit rest mass. The results show that, with just a few thousands of relatively bright, photometrically stable, and astrometrically well… 

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