A Tighter Test of Local Lorentz Invariance using PSR J2317+1439

Details A Tighter Test of Local Lorentz Invariance using PSR J2317+1439 A Tighter Test of Local Lorentz Invariance using PSR J2317+1439

1995-12-14

arxiv.org/abs/astro-ph/9512100v1

Astrophys.J. 464 (1996) 857

Astronomy and Astrophysics

Astrophysics

4 pages, LaTeX, requires aaspp4.sty and flushrt.sty, submitted to ApJ

Scientific paper

10.1086/177372

Gravity being a long-range force, one might {\it 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 binary pulsars, is described by two parameters $\hat{\alpha}_1$ and $\hat{\alpha}_2$. These parameters vanish identically in general relativity, and reduce, in the weak-field limit, to the two parametrized post-Newtonian (PPN) parameters ${\alpha}_1$ and ${\alpha}_2$. We derive a limit of $|\hat{\alpha}_1| < 1.7\times 10^{-4}$ (90\%~C.L.) using the very low eccentricity binary pulsar PSR J2317+1439, improving by a factor of 3 on previous limits.

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