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A precise extragalactic test of General Relativity
- Publication Year :
- 2018
-
Abstract
- Einstein's theory of gravity, General Relativity, has been precisely tested on Solar System scales, but the long-range nature of gravity is still poorly constrained. The nearby strong gravitational lens, ESO 325-G004, provides a laboratory to probe the weak-field regime of gravity and measure the spatial curvature generated per unit mass, $\gamma$. By reconstructing the observed light profile of the lensed arcs and the observed spatially resolved stellar kinematics with a single self-consistent model, we conclude that $\gamma = 0.97 \pm 0.09$ at 68% confidence. Our result is consistent with the prediction of 1 from General Relativity and provides a strong extragalactic constraint on the weak-field metric of gravity.<br />Comment: Published in Science. 42 pages, 10 figures including supplementary text and figures
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1806.08300
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1126/science.aao2469