Parkes observations for project P1027 semester 2019OCTS_08

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.

我们提议对由澳大利亚平方公里阵列探路者（Australian SKA Pathfinder, ASKAP）与帕克斯超宽带低（Ultra-Wideband Low, UWL）接收机发现的新型毫秒脉冲星（millisecond pulsar）J1431-6328开展帕克斯望远镜后续观测。此次发现证明了通过射电连续谱图像筛选脉冲星候选体，再结合高时间分辨率观测开展后续研究的有效性。该发现本身亦颇具研究价值：脉冲星PSR J1431-6328的自转周期为2.77毫秒，极有可能处于双星系统之中。后续观测将帮助我们测定其双星系统参数，这将为未来多波段观测提供指引，亦有望为双星演化研究带来新的见解。此外，PSR J1431-6328凭借其较短的自转周期、相对较高的流量密度以及所处的天区位置，成为脉冲星计时阵列的极具潜力的候选体。本次提议的观测将使我们能够获取该新型脉冲星的计时解，因此对于未来的计时观测而言至关重要。