alexa Measurement of the Solar Gravitational Deflection of Radio Waves using Geodetic Very-Long-Baseline Interferometry Data, 1979–1999
Physics

Physics

Journal of Astrophysics & Aerospace Technology

Author(s): S S Shapiro, J L Davis, D E Lebach, J S Gregory

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We used very-long-baseline interferometry (VLBI) to measure the deflection by the Sun of radio waves emanating from distant compact radio sources. This bending is characterized in the parametrized post-Newtonian formalism by γ, which is unity in general relativity. Using a large geodetic VLBI data set, we obtained γ=0.99983±0.00045 (estimated standard error). We found no systematic biases from our analysis of subgroups of data.

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This article was published in PHYSICAL REVIEW LETTERS and referenced in Journal of Astrophysics & Aerospace Technology

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