Parkes observations for project P1173 semester 2022OCTS_07

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（Spider pulsar systems）是一类拥有低质量伴星的密近双星脉冲星，二者运行于紧凑轨道之上；由于轨道间距极近，主脉冲星会凭借自身高能辐射与脉冲星风的输出，对次级伴星实施物质剥离。此类系统为我们在射电频段下探究这类低质量天体的毁灭机制提供了绝佳研究契机：被剥离的伴星碎屑会环绕形成包裹云团，当脉冲星辐射沿视线方向穿过该云团时，会发生传播与散射，进而揭示出该区域复杂且湍流的结构细节。近期研究表明，食掩区域会使脉冲星信号发生散射，展现出湍流场的小尺度结构，同时还会引发脉冲星偏振特性、旋转测度与色散测度的显著变化。基于本研究提案，我们计划利用帕克斯（Parkes）望远镜的UWL观测能力，对两颗已发现的蜘蛛脉冲星开展全轨道观测——这是其他任何望远镜均未实现的观测方案，借此我们得以深入分析此类系统的食掩效应。