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（Spider pulsar systems）是一类拥有低质量伴星的密近双星脉冲星，二者轨道间距极近。由于距离过近，主脉冲星通过高能辐射输出与脉冲星风侵蚀其伴星。这类系统为研究射电波段下低质量天体的破坏机制提供了绝佳的研究契机：被侵蚀的伴星周围形成的残骸会使脉冲星辐射在沿观测者视线方向穿过该区域时发生传播与散射，从而揭示该区域复杂且湍流的结构细节。
近期研究表明，掩食区域可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（polarization）、旋转量度（rotation measure）与色散量度（dispersion measure）出现显著变化。
在本项目提案框架下，我们拟利用帕克斯（Parkes）UWL观测能力，对两颗已知的蜘蛛脉冲星开展完整轨道观测——这是其他望远镜尚未实现的观测目标。此举将为我们分析这类系统的掩食效应提供宝贵的研究机会。