Parkes observations for project P1041 semester 2020OCTS_03

We propose to start 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 the ionised medium and magnetic fields in the cluster core.

本研究提议针对在半人马座ω球状星团中发现的毫秒脉冲星（MSPs）开展长期计时观测项目。截至目前，我们已发现7颗MSPs，并为其中5颗获得了相干计时解。本项目申请使用帕克斯超宽频低（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。对这些MSPs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性，并对中等质量黑洞的存在性给出严格约束；(2) 揭示星团核心的γ射线辐射起源，并对暗物质参数施加严苛约束；(3) 研究星团核心中的电离介质与磁场环境。