SIMBAD references

2007MNRAS.376.1727I - Mon. Not. R. Astron. Soc., 376, 1727-1730 (2007/April-3)

A model-independent test of the spatial variations of the Newtonian gravitational constant in some extrasolar planetary systems.


Abstract (from CDS):

In this paper, we directly constrain possible spatial variations of the Newtonian gravitational constant G over the range ~0.01-5 au in various extrasolar multiplanet systems. Using the third Kepler law, we determine the quantity ΓXY= GX/GY for each couple of planets X and Y located at different distances from their parent star; deviations of the measured values of Γ from unity would signal variations of G. The obtained results for η = 1 - Γ are found to be very compatible with zero within the experimental errors (η/δη ~ 0.2-0.3). We make a comparison with an analogous test previously performed in our Solar system.

Abstract Copyright: 2007 The Author. Journal compilation © 2007 RAS

Journal keyword(s): gravitation - celestial mechanics - ephemerides - planetary systems

Simbad objects: 17

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