Parkes observations for project P971 semester 2018OCTS_05

We propose timing observations of the relativistic pulsar - white-dwarf binary PSR J1141-6545. This unique system offers access to a wide range of physics, from relativistic phenomena through pulsar emission cone studies, to the structure and distribution of interstellar plasma along our line-of-sight. The recently installed Parkes Ultra Wide Band Low Frequency (UWL) receiver has opened up the possibility of performing first-ever studies of its orbital dynamics at high temporal resolution and study of the effects of the intra-binary medium on the dispersion and polarisation of the pulse profile. Our analysis of data obtained to date suggests that the pulsar would precess away from our line-of-sight in the next 3-5 years. Hence, regular observations are crucial to maximizing its science outcome

本研究提出对相对论性脉冲星-白矮星双星系统PSR J1141-6545开展计时观测。该独特天体系统可覆盖多维度物理研究场景，涵盖相对论现象、脉冲星辐射束研究，以及视线方向上星际等离子体的结构与分布特征。近期启用的帕克斯超宽频低频（UWL）接收机，首次实现了以高时间分辨率对该系统轨道动力学的研究，并可分析双星内部介质对脉冲轮廓色散与偏振特性的影响。基于现有观测数据的分析结果显示，该脉冲星将在未来3至5年内进动脱离我们的视线方向。因此，常态化观测对最大化其科学产出至关重要。