Parkes observations for project P1207 semester 2023OCTS_02

Whether there is a large population of pulsars in the Bulge, millisecond pulsars in particular, is a long-standing problem. We recently carried out a survey of a small region toward the Bulge with the Five-hundred-meter Aperture Spherical Telescope (FAST) and discovered more than 10 pulsar candidates. Four bright pulsar candidates are estimated to have distances larger than 3kpc and are therefore likely located in the Bulge region. Considering the small number of pulsars we know in the Bulge, the determination of spin and astrometric parameters of these pulsars can be important for us to understand the pulsar population in the Bulge. These information can then be used to investigate the origin of Gamma-ray emission and the electron density distribution in the region. Here we propose to carry out confirmation observation of nine pulsar candidates and time those four bright ones (detected with S/N>20, and with distance larger than 3kpc) with Parkes.

银河系核球中是否存在大量脉冲星，尤其是毫秒脉冲星，长期以来都是一个悬而未决的科学难题。我们近期利用500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope, FAST）对朝向银河系核球的一小块天区开展巡天观测，共发现十余颗脉冲星候选体。其中四颗亮脉冲星候选体的距离经估算超过3千秒差距（kpc），因此它们大概率位于核球天区范围内。鉴于目前已知的核球区脉冲星数量极少，精准测定这批脉冲星的自转参数与天体测量参数，将有助于我们深入理解核球区的脉冲星种群分布特征。上述参数可用于研究该区域的伽马射线辐射起源与电子密度分布情况。在此，我们提出利用帕克斯望远镜（Parkes）对九颗脉冲星候选体开展证认观测，并对其中四颗（信噪比[S/N]>20且距离超过3千秒差距）亮脉冲星进行计时观测。