Parkes observations for project P1027 semester 2019OCTS_05

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.

本研究提议对由澳大利亚平方公里阵列探路者（Australian SKA Pathfinder, ASKAP）与帕克斯超宽频低（Ultra-Wideband Low, UWL）接收机发现的新型毫秒脉冲星J1431-6328开展帕克斯后续观测。此次发现证实了通过射电连续谱图像筛选脉冲星候选体，继而开展高时间分辨率后续观测的研究范式的有效性。此项发现本身亦具备重要科研价值。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中。后续观测将帮助我们测定该双星系统的各项参数，可为未来多波段观测提供指导，并有望为双星演化研究提供全新的认知视角。脉冲星PSR J1431-6328凭借较短的自转周期、相对较高的流量密度以及适宜的天区位置，成为脉冲星计时阵列（pulsar timing arrays, PTA）极具潜力的候选观测目标。本次提议的观测将使我们得以获取该新型脉冲星的计时解，因此对于后续的计时观测工作而言至关重要。