Parkes observations for project P971 semester 2019APRS_14

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

我们建议对相对论性脉冲星-白矮星双星系统（relativistic pulsar-white-dwarf binary）PSR J1141-6545开展计时观测。该独特系统为研究广泛的物理现象提供了窗口，从相对论效应（relativistic phenomena）到脉冲星辐射锥研究，再到视线方向（line-of-sight）上星际等离子体（interstellar plasma）的结构与分布均有涉及。近期安装的帕克斯超宽带低频（UWL）接收机开启了新的可能：首次以高时间分辨率研究其轨道动力学，并探究双星内部介质（intra-binary medium）对脉冲轮廓色散与极化特性（dispersion and polarisation of the pulse profile）的影响。我们对迄今获取的数据的分析表明，该脉冲星将在未来3-5年内进动（precess）偏离我们的视线方向。因此，定期观测对于最大化其科学产出至关重要。