Abstract Under the standard model extension (SME) framework, Lorentz invariance is tested in five binary pulsars: PSR J0737–3039, PSR B1534+12, PSR J1756−2251, PSR B1913+16 and PSR B2127+11C. By analyzing the advance of periastron, we obtain the constraints on a dimensionless combination of SME parameters that is sensitive to timing observations. The results imply no evidence for the break of Lorentz invariance at the 10−10 level, one order of magnitude larger than the previous estimation.

Keywords gravitation — relativity — pulsars: individual (PSR 0737−3039, PSR B1534+12, PSR J1756−2251, PSR B1913+16, PSR B2127+11C)

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