Parkes observations for project P1058 semester 2020OCTS_06

We propose to continue the timing campaign of the new millisecond pulsar, J1431-6328, discovered by the Australian SKA Pathfinder (ASKAP). PSR J1431-6328 has a spin period of 2.77 ms and is in a very wide binary system with an orbital period of 88 days. The relatively low mass of the companion and the long orbital period make this binary system extremely interesting for the understanding of binary evolution. The stable profile and wide orbit of J1431-6328 also makes it a good candidate for pulsar timing arrays and tests of the strong equivalence principle. By the end of this semester, we plan to summarise the timing campaign with a paper and publish the timing solution, wide band polarisation properties of this pulsar and studies of the binary system.

本研究拟延续澳大利亚平方千米阵列探路者（ASKAP）发现的新毫秒脉冲星（millisecond pulsar）J1431-6328的计时观测项目。该脉冲星自转周期为2.77毫秒，处于轨道周期达88天的极宽双星系统中。其伴星质量相对较低且轨道周期极长，使得该双星系统对于双星演化的研究具备极高学术价值。同时，J1431-6328稳定的脉冲轮廓与宽轨道特性，使其成为脉冲星计时阵列（pulsar timing arrays）与强等效原理（strong equivalence principle）检验的优质候选对象。本学期末，我们计划以学术论文形式总结本次计时观测项目，并公开该脉冲星的计时解、宽带偏振特性以及双星系统相关研究成果。