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A Tighter test of local Lorentz invariance of gravity using PSR-2317+1439

Dec, 1995
5 pages
Published in:
  • Astrophys.J. 464 (1996) 857
e-Print:
DOI:
Report number:
  • IHES-P-95-100
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Abstract: (arXiv)
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 α^1\hat{\alpha}_1 and α^2\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 α1{\alpha}_1 and α2{\alpha}_2. We derive a limit of ∣α^1∣<1.7×10 −4|\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.
Note:
  • 4 pages, LaTeX, requires aaspp4.sty and flushrt.sty, submitted to ApJ Report-no: IHES/P/95/100