Parkes observations for project P1207 semester 2023OCTS_03

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.

核球（Bulge）中是否存在大量脉冲星（尤其是毫秒脉冲星）是一个长期悬而未决的问题。我们近期利用500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope，FAST）对核球方向的一小块区域开展了巡天观测，发现了10余颗脉冲星候选体。其中4颗明亮的脉冲星候选体被估计距离超过3千秒差距（kpc），因此可能位于核球区域内。鉴于目前已知的核球脉冲星数量有限，测定这些脉冲星的自旋及天体测量参数，对于理解核球中的脉冲星群体至关重要。这些信息可进一步用于探究该区域伽马射线辐射的起源及电子密度分布。在此，我们提议利用帕克斯望远镜（Parkes）对9颗脉冲星候选体进行确认观测，并对上述4颗明亮候选体（信噪比（S/N）>20且距离大于3千秒差距）开展计时观测。