Recent VLBA/VERA/IVS Tests of General Relativity

Details Recent VLBA/VERA/IVS Tests of General Relativity Recent VLBA/VERA/IVS Tests of General Relativity

2009-12-17

arxiv.org/abs/0912.3421v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 3 figures, IAU261 conference proceedings. IAU 261 Symposium Proceedings, in press

Scientific paper

We report on recent VLBA/VERA/IVS observational tests of General Relativity. First, we will summarize the results from the 2005 VLBA experiment that determined gamma with an accuracy of 0.0003 by measuring the deflection of four compact radio sources by the solar gravitational field. We discuss the limits of precision that can be obtained with VLBA experiments in the future. We describe recent experiments using the three global arrays to measure the aberration of gravity when Jupiter and Saturn passed within a few arcmin of bright radio sources. These reductions are still in progress, but the anticipated positional accuracy of the VLBA experiment may be about 0.01 mas.

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