Parkes observations for project P971 semester 2018OCTS_02

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

本研究提议对相对论性脉冲星（relativistic pulsar）-白矮星双星系统（white-dwarf binary）PSR J1141-6545开展计时观测（timing observations）。该独特双星系统可支撑多维度物理学研究，涵盖相对论现象（relativistic phenomena）、脉冲星辐射锥（pulsar emission cone）研究，以及视线方向上星际等离子体（interstellar plasma）的结构与分布。新近安装的帕克斯超宽频低频（UWL）接收机，为首次开展高时间分辨率（high temporal resolution）下的轨道动力学（orbital dynamics）研究，以及探究双星内部介质（intra-binary medium）对脉冲轮廓（pulse profile）的色散（dispersion）与偏振（polarisation）的影响提供了可能。基于迄今获取的数据所做的分析表明，该脉冲星将在未来3至5年内偏离我们的视线方向发生进动。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。