Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2003-06-06
Gravitational waves and experimental gravity, Proc. of the 38th Rencontres de Moriond (J. Dumarchez & J. Tran Thanh Van, eds.)
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
LaTeX, 6 pages. Text of a talk given at the Rencontres de Moriond: Gravitational Waves and Experimental Gravity, Les Arcs, Fra
Scientific paper
A scalar theory with a preferred reference frame is summarized. To test that theory in celestial mechanics, an "asymptotic" post-Newtonian (PN) scheme has been developed. This associates a conceptual family of self-gravitating systems with the given system, in order to have a true small parameter available. The resulting equations for a weakly-self-gravitating system of extended bodies include internal-structure effects. The internal-structure influence subsists at the point-particle limit--a violation of the weak equivalence principle. If one could develop an "asymptotic" approximation scheme in general relativity also, this could plausibly be found there also, in a gauge where the PN space metric would not be "conformally Euclidean".
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