Parkes observations for project P1027 semester 2019OCTS_01

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.

我们提议对新发现的毫秒脉冲星（millisecond pulsar）J1431-6328开展帕克斯后续观测，该脉冲星由澳大利亚平方公里阵列探路者（Australian SKA Pathfinder, ASKAP）与帕克斯超宽带低频（Ultra-Wideband Low, UWL）接收器共同发现。这一发现证明了在射电连续谱图像中识别脉冲星候选体，再通过高时间分辨率观测进行后续验证的方法的有效性。该发现本身亦具有研究价值。PSR J1431-6328的自转周期为2.77毫秒，且可能处于双星系统中。后续观测将使我们能够测量其双星参数，这将为未来的多波段观测提供指导，并可能为双星演化研究带来新的启示。PSR J1431-6328的短自转周期、相对较高的流量密度及其天区位置，也使其成为脉冲星计时阵列（pulsar timing array）的潜在候选体。提议的观测将使我们能够获得该新脉冲星的计时解，因此对未来的计时观测至关重要。