Improved Test of the Equivalence Principle for Gravitational Self-Energy

Details Improved Test of the Equivalence Principle for Gravitational Self-Energy Improved Test of the Equivalence Principle for Gravitational Self-Energy

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999phrvl..83.3585b&link_type=abstract

Physical Review Letters, Volume 83, Issue 18, November 1, 1999, pp.3585-3588

Physics

116

Scientific paper

The lunar-ranging test of the equivalence principle for gravitational self-energy is ambiguous. Although the Earth has more gravitational self-energy than the Moon, its sizable Fe/Ni core also gives it a different composition than the Moon. We removed this ambiguity by comparing, in effect, the accelerations of ``miniature'' earths and moons toward the Sun. Our composition-dependent Earth-Moon acceleration, ΔaCD/as = \(+0.1+/-2.7+/-1.7\)×10-13, and lunar-ranging data provide an unambiguous test at the 1.3×10-3 level.

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