Parkes observations for project P1173 semester 2022OCTS_05

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，二者处于紧密轨道运行。由于轨道间距极近，主脉冲星通过自身辐射的高能辐射与脉冲星风，对次级伴星实施侵蚀剥离。此类系统为研究射电波段下低质量天体的破坏机制提供了理想的研究契机：被侵蚀剥离的次级伴星周围形成的残骸，会使脉冲星射电信号在沿视线方向传播的过程中发生散射，进而揭示该区域复杂且充满湍流的结构细节。

已有研究表明，食区域会导致脉冲星信号发生散射，不仅能揭示湍流场的小尺度结构，还会使脉冲星的偏振、旋转量（rotation measure）与色散量（dispersion measure）出现显著变化。

在本研究计划中，我们拟借助帕克斯望远镜的超宽频带（UWL）观测能力，对两颗已发现的蜘蛛脉冲星开展全轨道监测——这是其他望远镜均未实现的观测方案。该观测将为我们深入分析此类系统的食变效应提供宝贵的研究机遇。