Parkes observations for project P860 semester 2019APRS_10

This is a request for observing time for the initial follow-up of pulsar discoveries from the low-latitude Galactic plane section of the HTRU survey (P630). We have now completed a first pass processing of the entire survey with our periodicity search algorithm as well as the partially-coherent segmented acceleration search pipeline, and have discovered 106 previously unknown pulsars. Interesting science can usually only be derived from a new pulsar after confirmation and a follow-up timing campaign is carried out. One year of initial timing is the minimum timespan required to fully characterise any newly-discovered pulsars, essential for deriving pulsar parameters such as the characteristic age, magnetic ?eld strength, spin-down rate, as well as to detect any unexpected behaviour of the pulsar which might result from emission instabilities. This follow-up timing project is necessary for following up on any interesting pulsar systems discovered from the HTRU Galactic plane survey. Since all of the pulsars on the observing list here are being followed-up for the first time, they will produce completely new and exciting results. In addition, this timing project will enable a large-scale examination of the Galactic plane pulsar population, exploring the true boundaries of pulsar parameter space.

本申请为HTRU巡天（HTRU Survey，P630）银道面低纬度区域内新发现脉冲星的首次后续观测申请配套观测时长。目前我们已利用周期搜索算法（periodicity search algorithm）及部分相干分段加速搜索流水线（partially-coherent segmented acceleration search pipeline）完成全部巡天数据的首轮处理，共发现106颗此前未被报道的脉冲星。通常而言，新发现的脉冲星仅在完成证认并开展后续计时观测项目后，才能产出具有科学价值的研究成果。对新发现脉冲星开展至少一年的初始计时观测，是完整表征其物理特性的最低时长要求，这也是获取脉冲星特征年龄（characteristic age）、磁场强度、自转减速率（spin-down rate）等关键参数，以及探测可能由辐射不稳定性引发的脉冲星异常行为的必要前提。本次后续计时观测项目，是针对HTRU银道面巡天中发现的各类具有研究价值的脉冲星系统开展后续观测的必要环节。由于本次观测列表中的所有脉冲星均为首次启动后续观测，相关研究将产出全新且极具突破性的科研成果。此外，本计时观测项目还可实现对银道面（Galactic plane）脉冲星族群的大规模普查，从而深入探索脉冲星参数空间（pulsar parameter space）的真实边界。