Parkes observations for project P1054 semester 2022OCTS_05

With this proposal we ask time to continue our timing follow-up campaign of pulsars discovered with the MeerKAT telescope. Eighteen sources have been discovered in targeted observations of Fermi unidentified point sources, six in the Small Magellanic Cloud, 54 in Globular Clusters and 66 in a survey of the Galactic plane. A large fraction of the new discoveries are recycled pulsars (including at least one double neutron star system and several 'spider' binaries), or young pulsars. Timing observations have an essential role in exploiting the full potential of any pulsar discovery, allowing the precise measurement of rotational, astrometric and orbital parameters which, in turn, give us powerful tools to improve our understanding of the physics in extreme environments as well as of the population of neutron stars as a whole. The UWL receiver of the Parkes telescope is a sensitive, versatile instrument that is allowing us to successfully time these new sources, in the bright-end of TRAPUM discoveries. The UWL has also the unique advantage of allowing detailed studies of the eclipses of the so-called 'spider' pulsars, which make up about 1/3rd of the sources we aim at following-up with this project.

本提案申请继续推进基于MeerKAT望远镜发现的脉冲星的计时后续观测项目。我们已在费米未证认点源靶向观测中发现18颗脉冲星，在小麦哲伦星云中发现6颗，在球状星团中发现54颗，在银道面巡天中发现66颗。本次新发现的脉冲星中，多数为再循环脉冲星（含至少1个双中子星系统与若干蜘蛛型双星（spider binaries）），亦或是年轻脉冲星。计时观测对于充分释放每颗脉冲星发现的科学潜力至关重要，可实现自转参数、天体测量参数与轨道参数的精确测量，进而为我们深化极端环境物理规律与整体中子星族群的认知提供强有力的工具。帕克斯望远镜的UWL接收机（UWL receiver）是一台高灵敏度、多用途的观测设备，可助力我们对本次TRAPUM巡天发现的亮端新源开展成功计时观测。此外，UWL接收机还具备独特优势，可对所谓的蜘蛛型脉冲星（spider pulsars）的食现象开展详细研究——这类源约占本项目后续观测目标源的三分之一。