Parkes observations for project P1027 semester 2019OCTS_11

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.

本研究拟对由澳大利亚平方千米阵列探路者（Australian SKA Pathfinder, ASKAP）与帕克斯（Parkes）超宽频低（Ultra-Wideband Low, UWL）接收机发现的新型毫秒脉冲星J1431-6328，开展帕克斯望远镜后续观测。此次发现验证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进行证认的研究路径的有效性。该脉冲星本身亦具备较高研究价值：其自转周期为2.77毫秒，极大概率处于双星系统中。后续观测将帮助我们测定该双星系统的各项参数，可为后续多波段观测研究提供指引，亦有望为双星演化机制的探索提供全新视角。此外，脉冲星J1431-6328的短自转周期、相对较高的流量密度以及所处的天区位置，使其成为脉冲星计时阵列极具潜力的候选观测目标。本次拟开展的观测将帮助我们获得该新发现脉冲星的计时解，因此对于后续脉冲星计时观测而言至关重要。