Parkes observations for project P1336 semester 2024OCTS_05

This proposal aims to confirm the periodic radio pulsations of the polarised sources identified in the MeerKAT Bulge imaging survey. Discovering pulsars through blind single-dish radio surveys and traditional search methods can be impractical due to excess pulse smearing towards the Galactic center and the steep-spectrum nature of the pulsars. However, targeted searches on pulsar candidates discovered in imaging surveys based on their polarization properties are proving to be an extremely useful alternative. Given their potential visibility primarily at higher frequencies due to the less pronounced effect of scattering at these frequencies, the Ultra Wide Low Band (UWL) receiver of the Parkes Radio Telescope (Murriyang) is the most promising instrument to confirm their pulsar nature. We hence request Parkes/Murriyang UWL observations of these candidates to search for pulsations.

本申请旨在确认MeerKAT银核球成像巡天中识别出的偏振源（polarised sources）的周期性射电脉冲信号。受银心方向脉冲展宽效应显著、脉冲星（pulsars）具备陡谱特性的影响，通过盲单碟射电巡天与传统搜寻方法发现脉冲星的可行性较低。然而，基于偏振特性对成像巡天中发现的脉冲星候选体开展定向搜寻，已被证明是极具实用价值的替代方案。鉴于这类源在高频段的散射效应较弱，其潜在观测窗口主要集中于高频段，因此帕克斯射电望远镜（Parkes Radio Telescope，别名Murriyang）的超宽低频接收机（Ultra Wide Low Band, UWL）是确认其脉冲星本质的最具潜力的观测设备。据此，我们申请使用帕克斯/Murriyang望远镜的UWL接收机对上述候选体开展观测以搜寻脉冲信号。