Parkes observations for project P971 semester 2018OCTS_04

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

本研究拟对相对论性脉冲星-白矮星双星系统PSR J1141-6545开展计时观测。该独特双星系统可支撑多维度物理研究，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。新近加装的帕克斯超宽频低频（Ultra Wide Band Low Frequency, UWL）接收机，为两项首创性研究提供了可能：一是以高时间分辨率解析其轨道动力学特性，二是探究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表明，该脉冲星将在未来3至5年内向远离我们视线的方向进动。因此，开展常态化观测对最大化该系统的科学产出至关重要。