Parkes observations for project P1173 semester 2022OCTS_06

Spider pulsar systems are compact binary pulsars with low-mass companions in tight orbits, where the\r\nprimary pulsar is ablating the secondary through the output of high-energy radiation and pulsar wind due\r\nto proximity. These systems present an interesting opportunity to probe the mechanisms related to the destruction of these low-mass bodies in the radio regime, as debris surrounding the ablated secondary companion causes the pulsar emission to propagate and scatter as it moves through it, along our line of sight - revealing details of the complex, turbulent structure of this region. Recent studies have shown that the eclipsing region can cause pulsar signals to scatter, revealing small-scale structure of the turbulent field, as well as a strong variation in the pulsar’s polarsiation, rotation measure and dispersion measure. Under this proposal, we wish to study two known spider pulsars for their full orbit with the Parkes UWL capability – which has not been achieved by any other telescope. This will give us the opportunity to analyse he eclipsing effects of these systems.

蜘蛛脉冲星系统是一类拥有低质量伴星的致密双星脉冲星，其主脉冲星因与伴星距离接近，通过高能辐射和脉冲星风剥蚀次级天体。这类系统为探究射电波段下低质量天体的破坏机制提供了绝佳契机：被剥蚀次级伴星周围的碎片会使脉冲星辐射在沿视线方向穿过碎片时发生传播与散射，从而揭示该区域复杂湍流结构的细节。近期研究表明，掩食区域会导致脉冲星信号散射，不仅揭示湍流场的小尺度结构，还会使脉冲星的偏振、旋转量度（Rotation Measure）及色散量度（Dispersion Measure）发生显著变化。本项目拟利用帕克斯望远镜的超宽带（UWL）功能，对两颗已知的蜘蛛脉冲星进行全轨道观测研究——这是其他望远镜尚未实现的。此举将为我们分析这些系统的掩食效应提供契机。