Proposed High-Accuracy Gyroscope Test of General Relativity and the Search for a Massless Scalar Field

Details Proposed High-Accuracy Gyroscope Test of General Relativity and the Search for a Massless Scalar Field Proposed High-Accuracy Gyroscope Test of General Relativity and the Search for a Massless Scalar Field

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvl..74.1904l&link_type=abstract

Physical Review Letters, Volume 74, Issue 11, March 13, 1995, pp.1904-1907

Astronomy and Astrophysics

Astronomy

10

Scientific paper

A high-accuracy orbiting relativity experiment is described. A pure unsupported gyroscope in a spinning drag-free satellite at ambient temperatures with conventional optical instrumentation can measure relativity drifts with errors as low as 3-0.1 arc μsec/yr, an improvement of 102-103 over the current GP-B experiment. Recent theoretical work has suggested that the post-Newtonian parameter 1-γ~1/ωBD might lie in the range 10-4- 10-8, signaling the presence of a massless scalar field. The experiment described here could measure γ to an accuracy between 10-7 and 10-8; for the highest accuracies, the measurement depends critically on future microarcsecond astrometry or a two-gyro version of the experiment.

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