Parkes observations for project P1058 semester 2020APRS_01

We propose to carry out a Parkes timing campaign of the new millisecond pulsar, J1431-6328, discovered by the Australian SKA Pathfinder (ASKAP) and Parkes Ultra-Wideband Low (UWL) receiver. 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 wide orbit of J1431-6328 also makes it useful for tests of the strong equivalence principle. The proposed program will allow us to better measure its binary parameters and to achieve more precise localisation of the pulsar, which is crucial for the optical follow-up of the system.

我们计划针对新发现的毫秒脉冲星J1431-6328开展帕克斯计时观测计划。该脉冲星由澳大利亚平方公里阵列探路者（ASKAP）与帕克斯超宽带低频（UWL）接收器联合发现，自旋周期为2.77毫秒，处于一个轨道周期达88天的极宽双星系统中。伴星相对较低的质量与较长的轨道周期，使该双星系统对理解双星演化具有极高的研究价值。此外，J1431-6328的宽轨道特性，也使其适用于强等效原理的验证实验。