Parkes observations for project P1041 semester 2020APRS_07

We recently discovered five millisecond pulsars (MSPs) in the globular cluster Omega Centauri. This is the first pulsar discovery in this globular cluster. Four of these pulsars are isolated with spin periods of 4.1, 4.2, 4.6 and 6.8ms. The fifth has a spin period of 4.8ms and is in an eclipsing binary system with an orbital period of 2.1 hours. We propose to carry out a timing campaign of these new pulsars in order to study the dynamics in the core of Omega Centauri, to reveal the origin of Gamma-ray emission from the core, and to probe the ionised interstellar medium in Omega Centauri. Our proposed observations will also enable us to carry out deeper searches of pulsars in the cluster.

我们近期在球状星团半人马座ω（Omega Centauri）中发现了5颗毫秒脉冲星（millisecond pulsars, MSPs），这是该球状星团内首次发现脉冲星。其中4颗为孤立脉冲星，自转周期分别为4.1、4.2、4.6与6.8毫秒。第5颗脉冲星自转周期为4.8毫秒，处于轨道周期2.1小时的食双星系统中。我们计划针对这批新发现的脉冲星开展计时观测计划，以研究半人马座ω核心区域的动力学特性、揭示其核心区域γ射线辐射的起源，并探测该星团内的电离星际介质。此外，本次拟开展的观测还将助力我们对该星团内的脉冲星开展更深层次的搜寻工作。