Astrometric tests of General Relativity in the Solar system

2nd International Conference on Mathematical Modeling in Physical Sciences 2013

物理学;数学

Gai, M.^1 ; Vecchiato, A.^1 ; Riva, A.^1 ; Lattanzi, M.G.^1 ; Sozzetti, A.^1 ; Crosta, M.T.^1 ; Busonero, D.^1

INAF-OATo, Turin, Italy^1

关键词: Competing models;    Development scenarios;    General Relativity;    Newtonians;    Orders of magnitude;    Phenomenological aspects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/490/1/012240/pdf
DOI  :  10.1088/1742-6596/490/1/012240

来源: IOP

【 摘 要 】

Micro-arcsec astronomy is able to verify the predictions of theoretical models of gravitation at a level adequate to constraint relevant parameters and select among different formulations. In particular, this concerns the weak field limit applicable to the Sun neighborhood, where competing models can be expressed in a common framework as the Parametrised Post-Newtonian and Parametrised Post-Post-Newtonian formulations. The mission Gaia is going to provide an unprecedented determination of the γ PPN parameter at the 10-6level. Other recently proposed concepts, as GAME, may improve the precision on γ by one or two orders of magnitude and provide constraints on other crucial phenomenological aspects. We review the key concepts of astrometric tests of General Relativity and discuss a possible development scenario.