Parkes observations for project P1041 semester 2022OCTS_01

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.

本研究提议针对在半人马座欧米茄（Omega Centauri）球状星团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，我们已发现7颗毫秒脉冲星，并为其中5颗获取了连贯计时解。本研究申请使用帕克斯超宽带低（Ultra-Wideband Low, UWL）接收机系统开展月度观测，以对已发现的脉冲星进行计时观测并搜寻新的脉冲星。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）研究星团核心的动力学特征，约束中等质量黑洞的存在性；（2）揭示星团核心的伽马射线辐射起源，并对暗物质参数施加严格限制；（3）在秒差距尺度上研究银河系电离介质与磁场。