Parkes observations for project P455 semester 2020APRS_05

This project is to continue timing and profile studies of the first double-pulsar system, a unique laboratory for gravitational physics. Recent results, including the first measurements of higher-order light-propagation effects and of the relativistic deformation of the orbit, highlight the importance of a long term observational campaign for this remarkable system. The main aims of this proposal are to provide the strongest tests to date for general relativity and to measure for the first time the moment-of-inertia of a neutron star. Additionally, we will determine the system geometry and map the pulsar beams via geodetic precession. Whenever possible, we will exploit the high sensitivity of the new UWL receiver.

本项目旨在对首个双脉冲星系统（double-pulsar system）开展持续的计时观测与脉冲轮廓研究，该系统是引力物理学领域独一无二的天然实验平台。近期的研究成果——包括首次测得高阶光传播效应与轨道相对论性形变——凸显了对这一特殊系统开展长期观测计划的重要意义。本提案的核心目标在于：为广义相对论（general relativity）提供截至目前最为严苛的实验检验，并首次完成中子星转动惯量（moment-of-inertia）的测量。此外，我们将通过测地岁差（geodetic precession）确定该双脉冲星系统的几何结构，并绘制脉冲星的波束分布图。在条件允许的情况下，我们将充分利用新型UWL接收机（UWL receiver）的高灵敏度特性。