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Title:
Measurement of the Solar Gravitational Deflection of Radio Waves using Geodetic Very-Long-Baseline Interferometry Data, 1979 1999
Authors:
Shapiro, S. S.; Davis, J. L.; Lebach, D. E.; Gregory, J. S.
Affiliation:
AA(Department of Physics, Guilford College, Greensboro, North Carolina 27410, USA), AB(Department of Physics, Guilford College, Greensboro, North Carolina 27410, USA), AC(Department of Physics, Guilford College, Greensboro, North Carolina 27410, USA), AD(Department of Physics, Guilford College, Greensboro, North Carolina 27410, USA)
Publication:
Physical Review Letters, vol. 92, Issue 12, id. 121101 (PhRvL Homepage)
Publication Date:
03/2004
Origin:
APS
PACS Keywords:
Experimental tests of gravitational theories, Radio microwave
DOI:
10.1103/PhysRevLett.92.121101
Bibliographic Code:
2004PhRvL..92l1101S

Abstract

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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Database: Astronomy
Physics
arXiv e-prints