Parkes observations for project P1032 semester 2021APRS_10

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（UWL）接收器与MeerKAT望远镜的数据，持续对南天脉冲双星系统的相对论参数开展快速测量，从而实现对子星质量的测定，并在部分案例中检验引力理论。我们将通过UWL数据获取这些脉冲星的充分轨道覆盖范围与计时基线，同时对轨道及时间弥散量（DM）变化施加关键约束，这将助力明确伴星的性质。随后，我们会利用关键轨道相位的MeerKAT数据，提升测量相对论参数的成功率。已测定的中子星（NS）质量数量的增加，对中子星内部结构以及恒星与双星演化物理领域具有深远意义。自本学期起，我们正将本提案转化为一份“大型项目”提案。