A Tighter Test of the Local Lorentz Invariance of Gravity Using PSR J2317+1439
- 1 June 1996
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 464, 857
- https://doi.org/10.1086/177372
Abstract
Gravity being a long-range force, one might a priori expect the Universe's global matter distribution to select a preferred rest frame for local gravitational physics. The phenomenology of preferred-frame effects, in the strong-gravitational field context of bi- nary pulsars, is described by two parameters ˆ �1 and ˆ �2. These parameters vanish iden- tically in general relativity, and reduce, in the weak-field limit, to the two parametrized post-Newtonian (PPN) parameters �1 and �2. We derive a limit of |ˆ �1| < 1.7 × 10−4 (90% C.L.) using the very low eccentricity binary pulsar PSR J2317+1439, improving by a factor of 3 on previous limits.Keywords
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