Parkes observations for project P1041 semester 2022OCTS_03

We propose to carry out a long-term timing campaign of millisecond pulsars (MSPs) discovered in the Globular Cluster Omega Centauri. So far, we have discovered seven MSPs and obtained coherent timing solutions for five of them. Monthly observations with the Parkes Ultra-Wideband Low (UWL) receiver system are requested to time known pulsars and search for new pulsars. Long-term timing and polarisation observations of these MSPs will provide us a new way to (1) study the dynamics of the core and constrain the existence of any intermediate-mass black holes; (2) reveal the origin of Gamma-ray emission from the core and put stringent constraints on dark matter parameters; (3) study Galactic ionised medium and magnetic fields on parsec scales.

本研究拟对在半人马座欧米茄球状星团（Globular Cluster Omega Centauri）中发现的毫秒脉冲星（millisecond pulsars, MSPs）开展长期计时观测项目。截至目前，本团队已发现7颗毫秒脉冲星，并为其中5颗获得了连贯计时解。本研究申请使用帕克斯超宽带低（UWL）接收机系统开展月度观测，以对已发现脉冲星进行计时并搜寻新的脉冲星。对上述毫秒脉冲星开展的长期计时与偏振观测，将为我们提供全新的研究路径：（1）研究该星团核心的动力学特性，并约束中等质量黑洞（intermediate-mass black holes）的存在性；（2）揭示星团核心γ射线（Gamma-ray）辐射的起源，并对暗物质参数（dark matter parameters）施加严格限制；（3）在秒差距尺度（parsec scales）上研究银河系电离介质（Galactic ionised medium）与磁场。