Parkes observations for project P1058 semester 2020OCTS_07

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.

本研究拟延续针对澳大利亚平方千米阵列探路者（Australian Square Kilometre Array Pathfinder, ASKAP）发现的新型毫秒脉冲星J1431-6328的计时观测项目。该脉冲星编号为PSR J1431-6328，自转周期为2.77毫秒，其所在双星系统的轨道周期长达88天，属于极宽双星系统。该双星系统的伴星质量相对较低、轨道周期偏长，使其成为研究双星演化的极具研究价值的对象。J1431-6328拥有稳定的脉冲轮廓与宽轨道特性，同时使其成为脉冲星计时阵列（pulsar timing arrays）研究与强等效原理（strong equivalence principle）检验的优质候选对象。本研究计划于本学期末完成该计时观测项目的总结论文，公开该脉冲星的计时解（timing solution）、宽带偏振特性（wide band polarisation properties）以及双星系统相关研究成果。