Parkes observations for project P778 semester 2012APRS

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.

我们申请观测时间，以便在南天球（就脉冲星含量而言）具有潜力的球状星团子集中，持续开展前所未有的深度毫秒脉冲星（millisecond pulsars）搜索。本次搜索将利用帕克斯天文台（Parkes）现有的新型后端设备（APSR与DFB3/DFB4），并与绿岸望远镜（GBT）正在进行的巡天项目形成互补——即针对GBT无法实施深度指向的天区范围内的星团展开观测。在选定的星团样本中发现毫秒脉冲星将带来以下成果：（i）对其所在恒星系统的性质施加独特约束；（ii）与费米卫星（Fermi satellite）开展的这些星团伽马射线辐射研究形成互补；（iii）可能发现少数偏心大质量毫秒脉冲星双星——这类天体是约束核物质状态方程（Equation of State of the nuclear matter）最具潜力的目标；（iv）或许能揭示奇异双星的存在，这类双星仅能在球状星团的致密恒星环境中形成。