Parkes observations for project P1348 semester 2024OCTS_04

We have discovered 6 candidate eclipsing binary millisecond pulsar (BMSPs) systems via image-plane searches for steep-spectrum radio sources with periodic variability. The radio emission, short eclipse periods (<1day), and Fermi association suggest they could be spider PSRs. Millisecond pulsations have recently been detected from a similarly identified candidate system. The discovery of millisecond pulsars (MSPs) in these systems would provide insights into the formation and evolution of spider PSRs. It would also improve predictions of the BMSP and MSP populations detectable by upcoming, highly sensitive image-plane surveys at low frequencies using precursors to, and eventually, the Square Kilometre Array (SKA) itself. Finally, 5 of our 6 candidates are also located in the Galactic bulge. If all such systems include MSPs, it would provide further compelling evidence that the Fermi GeV gamma-ray excess is coming from thousands of MSPs.

我们通过针对具有周期变异性的陡谱射电源开展像平面搜索，共发现6个候选食双星毫秒脉冲星（BMSPs）系统。此类源的射电辐射、短食周期（<1天）以及与费米（Fermi）卫星的关联特性，表明它们可能属于蜘蛛脉冲星（spider PSRs）。近期已有研究在一颗经类似方法认证的候选系统中探测到毫秒脉冲辐射。在这些系统中发现毫秒脉冲星（MSPs），将有助于揭示蜘蛛脉冲星的形成与演化机制；同时还可优化未来低频高灵敏度像平面巡天（包括平方公里阵列（SKA）的前期项目及该阵列本身）所能探测到的BMSP与MSP星族的预测模型。此外，我们发现的6颗候选系统中有5颗位于银河核球中。若此类系统均包含MSPs，则将为"费米GeV伽马射线超出源自数千颗MSPs"这一结论提供更具说服力的证据。