Parkes observations for project P1032 semester 2021APRS_18

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.

本项目旨在利用帕克斯超宽带低频接收机（Parkes Ultra Wideband Low, UWL）与MeerKAT望远镜的观测数据，持续开展南天双星脉冲星系统相对论性参数的快速测量工作，以此实现对系统各组成成员质量的测定，并在部分案例中验证引力理论。本项目将借助UWL数据获取这些脉冲星的有效轨道覆盖范围与计时基线，并对色散量（Dispersion Measure, DM）的轨道与时间变化施加重要约束，助力明确伴星的物理性质。后续将在关键轨道相位使用MeerKAT望远镜数据，以提升相对论性参数的测量成功率。已测得的中子星（Neutron Star, NS）质量样本数量的增加，对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，我们正将本提案升级为“大型项目”提案。