Parkes observations for project P1058 semester 2020OCTS_03

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.

我们提议延续由澳大利亚SKA探路者（Australian SKA Pathfinder, ASKAP）发现的新型毫秒脉冲星（millisecond pulsar）J1431-6328的计时观测项目。该脉冲星PSR J1431-6328的自转周期为2.77毫秒，身处轨道周期达88天的极宽双星系统之中。该双星系统的伴星质量相对偏低、轨道周期极长，使其成为探究双星演化的极具价值的研究对象。J1431-6328具备稳定的脉冲轮廓与宽阔的轨道，同时也是脉冲星计时阵列（pulsar timing arrays）与强等效原理（strong equivalence principle）检验的优质候选体。本学期末，我们计划以学术论文总结本次计时观测项目，并公开发布该脉冲星的计时解、宽带偏振特性以及双星系统相关研究成果。