Parkes observations for project P1032 semester 2021APRS_14

This project aims to continue to perform rapid measurements of relativistic parameters of southern binary pulsar systems using data from the Parkes Ultra Wideband Low (UWL) receiver and the MeerKAT telescope thereby enabling measurement of their component masses and in some cases, test theories of gravity. We will use the UWL data to obtain significant orbital coverage and timing baseline on these pulsars and obtain important constraints on orbital and temporal DM variations that will help in identifying the nature of the companion star. We will then use MeerKAT data at crucial orbital phases to improve our chances of measuring the relativistic parameters. Increase in the number of measured NS masses has profound implications for NS internal structure and for stellar and binary evolution physics. From this semester, we are converting this proposal into a ``Large project" proposal.

本项目旨在依托帕克斯（Parkes）超宽带低（UWL）接收机与MeerKAT望远镜的观测数据，持续快速测量南天双星脉冲星系统的相对论参数，以此实现对双星组成天体质量的测量，并在部分案例中检验引力理论。我们将利用UWL数据获取这些脉冲星的有效轨道覆盖范围与计时基线，同时获得轨道与时域色散量（Dispersion Measure, DM）变化的重要约束，助力明确伴星的物理性质。随后，我们将在关键轨道相位处使用MeerKAT观测数据，提升测量相对论参数的成功率。已测得的中子星（Neutron Star, NS）质量样本数量的增加，对于中子星内部结构研究以及恒星与双星演化物理学均具有深远意义。自本学期起，我们正将本项目申请转为‘大型项目’申请。