Parkes observations for project P1034 semester 2019OCTS_15

We recently discovered two millisecond pulsars (MSPs) in the globular cluster, Omega Centauri, the first pulsar discovery in this globular cluster. The discovery of these MSPs will enable us to study the stellar population and dynamics in the core of Omega Centauri, and to probe the ionised interstellar medium in Omega Centauri. These two MSPs are potentially in extreme eclipsing systems, and are useful for us to understand the formation of such systems. More importantly, our discoveries, for the first time, allow us to carry out a deep, coherently de-dispersed, high time resolution survey of pulsars in Omega Centauri, which might lead to exciting discoveries. We propose to carry out follow-up timing observations of the new discoveries, and a new coherently de-dispersed, high time resolution survey of Omega Centauri.

我们近期在球状星团（globular cluster）半人马座ω中发现了两颗毫秒脉冲星（MSPs），这是该球状星团中的首次脉冲星发现。这些MSPs的发现将使我们能够研究半人马座ω核心区域的恒星族群（stellar population）与动力学（dynamics）特性，并探测其电离星际介质（ionised interstellar medium）。这两颗MSPs可能处于极端掩食系统（extreme eclipsing systems）中，有助于我们理解此类系统的形成机制。更重要的是，我们的发现首次使我们能够对半人马座ω中的脉冲星开展深度、相干消色散（coherently de-dispersed）的高时间分辨率巡天（high time resolution survey），这或许会带来令人振奋的新发现。我们建议对这些新发现开展后续计时观测（follow-up timing observations），并对半人马座ω进行新一轮相干消色散的高时间分辨率巡天。