Parkes observations for project P1027 semester 2019OCTS_10

We propose to carry out Parkes follow-up observations of the new millisecond pulsar, J1431-6328, discovered by the Australian SKA Pathfinder (ASKAP) and Parkes Ultra-Wideband Low (UWL) receiver. The discovery demonstrated the power of identifying pulsar candidates in radio continuum images and then following up with high time resolution observations. The discovery itself is also interesting. PSR J1431-6328 has a spin period of 2.77 ms, and is likely to be in a binary system. Follow-up observations will enable us to measure the binary parameters, which will guide future multi-wavelength observations and might shed new lights on the binary evolution. The short spin period, relatively large flux density and sky location of PSR J1431-6328 also make it a promising candidate for pulsar timing arrays. The proposed observations will allow us to obtain a timing solution of this new pulsar, and are therefore essential for future timing observations.

我们提议对澳大利亚平方公里阵列探路者（ASKAP）与帕克斯超宽带低频（UWL）接收器联合发现的新毫秒脉冲星（millisecond pulsar）J1431-6328开展帕克斯后续观测。该发现不仅彰显了“在射电连续谱图像（radio continuum images）中识别脉冲星候选体（pulsar candidates），再通过高时间分辨率观测（high time resolution observations）进行跟进”这一方法的强大效力，其本身也具有重要研究价值。PSR J1431-6328的自旋周期（spin period）为2.77毫秒，且很可能处于双星系统（binary system）中。后续观测将使我们能够测量其双星参数（binary parameters），这不仅能为未来的多波段观测（multi-wavelength observations）提供指导，还有可能为双星演化（binary evolution）研究带来新的见解。此外，该脉冲星的短自旋周期、相对较大的流量密度（flux density）及其天空位置，也使其成为脉冲星计时阵列（pulsar timing arrays）的潜在优质候选体。本提议中的观测将帮助我们获取该新脉冲星的计时解（timing solution），这对未来的计时观测至关重要。