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PSR J1141-6545 - a powerful laboratory of GR and tensor-scalar theories of gravity

Pulsars in close binary systems have provided the most stringent tests of strong-field gravity to date. The pulsar--white-dwarf binary system J1141-6545 is specifically interesting due to its gravitational asymmetry, which makes it possibly the most powerful probe of tensor-scalar theories of gravity. We present the latest gravitational test results from this system, including an updated measurement of the pulsar and companion masses, determination of the orbital decay induced by gravitational wave emission and improved limits on possible tensor-scalar theories of gravity. Finally, we comment on timing instabilities and geodetic precession, which can negatively affect further improvements in timing precision and assess the potential of future tests to come from this system.

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