Parkes observations for project P361 semester 2013APRS

The neutron star-white dwarf relativistic binary PSR J1141-6545 is an important target for testing General Relativity and its competing alternatives. Our nine years of timing observations have enabled measurements of its orbital decay and Shapiro delay, as well as accurate determination of the two stellar masses. Our earlier limits for the strongly non-linear coupling parameter of tensor-scalar theories of gravity are expected to improve dramatically within the next year, as the pulsar's proper motion estimate can be by then obtained from our ongoing LBA astrometry project. This holds great prospects for conducting further stringent tests of the theories of gravity. We therefore propose to continue regular observations of this pulsar.\r\n

中子星-白矮星相对论双星PSR J1141-6545是检验广义相对论（General Relativity）及其竞争替代理论的重要目标。我们九年的计时观测已实现对其轨道衰减和夏皮罗延迟（Shapiro delay）的测量，以及对两颗恒星质量的精确测定。我们此前对张量-标量引力理论强非线性耦合参数的限制，有望在未来一年内得到显著改善——届时，脉冲星的自行估计值可通过我们正在进行的长基线阵列（Long Baseline Array, LBA）天体测量项目获得。这为进一步开展严格的引力理论检验提供了广阔前景。因此，我们提议继续对该脉冲星进行常规观测。