Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1779835 | New Astronomy | 2009 | 4 Pages |
Abstract
We consider the double pulsar PSR J0737-3039A/B binary system as a laboratory to locally test the orbital effects induced by an uniform cosmological constant Î in the framework of the known general relativistic laws of gravity, and the DGP braneworld model of gravity independently of the cosmological acceleration itself for which they were introduced. We, first, construct the ratio R=ÎÏË/ÎP of the discrepancies between the phenomenologically determined periastron rate ÏË and orbital period Pb and their predicted values from the 1PN ÏË1PN approximation and the third Kepler law P(0). Then, we compare its value |R|=(0.3±4)Ã10-11s-2, compatible with zero within the errors, to the ratios RÎ and RDGP of the effects induced on the apsidal rate and the orbital period by Î and the DGP gravity; we find them neatly incompatible with R being RÎ=(3.4±0.3)Ã10-8s-2 and RDGP=(1.4±0.1)Ã10-7s-2, respectively. Such a result, which for the case of Î is valid also for any other Hooke-like exotic force proportional to r, is in agreement with other negative local tests recently performed in the Solar System with the ratios of the non-Newtonian/Einsteinian perihelion precessions for several pairs of planets.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
Lorenzo Iorio,