Parkes observations for project P1058 semester 2020APRS_11

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.我们提议针对由澳大利亚平方千米阵列探路者（ASKAP）与帕克斯超宽带低（UWL）接收机发现的新毫秒脉冲星J1431-6328开展帕克斯计时观测项目。脉冲星PSR J1431-6328的自转周期为2.77毫秒，处于一个轨道周期达88天的极宽双星系统中。该双星系统的伴星质量相对较低且轨道周期漫长，使其成为研究双星演化机制的极具科研价值的对象。此外，J1431-6328的宽轨道特性也为强等效原理（strong equivalence principle）的检验提供了有效途径。本观测项目将帮助我们更精准地测定其双星参数，并实现该脉冲星的更高精度定位，这对于该系统的光学后续观测至关重要。