Parkes observations for project P778 semester 2013APRS

We request time for keeping on performing a deeper than ever search for millisecond pulsars in a subset of promising (as far as pulsar content) globular clusters in the southern sky. This search will exploit the new back-ends (APSR and DFB3/DFB4) now available at Parkes and will be complementary to the survey running at GBT (i.e. it will look at clusters outside the portion of sky suitable for deep GBT pointings). The discovery of millisecond pulsars in the selected sample of clusters (i) will lead to put unique constraints on the properties of the stellar systems which harbour them, (ii) will be complementary to the study of the gamma-ray emission from those clusters (performed by the Fermi satellite), (iii) can lead to the discovery of few eccentric massive millisecond pulsar binaries (the most promising targets for constraining the Equation of State of the nuclear matter) and (iv) might unveil the presence of exotic binaries whose formation is possible only in the dense stellar environment of a globular cluster.

本研究申请观测时长，以继续针对南天球区中一批具备突出脉冲星宿主潜力的球状星团，开展深度超越以往的毫秒脉冲星（millisecond pulsars）搜寻工作。本次搜寻将利用帕克斯（Parkes）望远镜当前搭载的新型后端设备APSR与DFB3/DFB4，并将与绿岸望远镜（GBT）正在开展的巡天项目形成互补——本巡天将覆盖绿岸望远镜深空指向无法适配的天区中的星团。在选定的星团样本中发现毫秒脉冲星，将带来如下科学价值：（i）为解析宿主脉冲星的恒星系统属性提供独一无二的约束条件；（ii）可与费米卫星（Fermi）针对这类球状星团的伽马射线辐射研究形成互补；（iii）有望发现少量大质量偏心轨道毫秒脉冲星双星系统，此类系统是约束核物质物态方程的最具潜力的候选目标；（iv）或许能够揭示仅能在球状星团致密恒星环境中形成的特殊双星系统的存在。