Solar System Constraints on the Dvali-Gabadadze-Porrati Braneworld Theory of Gravity

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Solar System Constraints on the Dvali-Gabadadze-Porrati Braneworld Theory of Gravity

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Title: Solar System Constraints on the Dvali-Gabadadze-Porrati Braneworld Theory of Gravity
Author: Battat, James; Stubbs, Christopher William; Chandler, John F.

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Citation: Battat, James, Christopher Stubbs, and John Chandler. 2008. Solar system constraints on the Dvali-Gabadadze-Porrati braneworld theory of gravity. Physical Review D 78(2): 022003.
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Abstract: A number of proposals have been put forward to account for the observed accelerating expansion of the Universe through modifications of gravity. One specific scenario, Dvali-Gabadadze-Porrati (DGP) gravity, gives rise to a potentially observable anomaly in the solar system: all planets would exhibit a common anomalous precession, \(dw/dt\), in excess of the prediction of General Relativity. We have used the Planetary Ephemeris Program (PEP) along with planetary radar and radio tracking data to set a constraint of \(|dw/dt|\) < 0.02 arcseconds per century on the presence of any such common precession. This sensitivity falls short of that needed to detect the estimated universal precession of \(|dw/dt| = 5 \times10^4\) arcseconds per century expected in the DGP scenario. We discuss the fact that ranging data between objects that orbit in a common plane cannot constrain the DGP scenario. It is only through the relative inclinations of the planetary orbital planes that solar system ranging data have sensitivity to the DGP-like effect of universal precession. In addition, we illustrate the importance of performing a numerical evaluation of the sensitivity of the data set and model to any perturbative precession.
Published Version: doi:10.1103/PhysRevD.78.022003
Other Sources: http://arxiv.org/abs/0805.4466
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:8004951
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