Parkes observations for project P1207 semester 2024APRS_11

The question of whether there exists a substantial population of pulsars, particularly millisecond pulsars, within the Galactic Bulge, has been a longstanding enigma. In a recent survey conducted toward the Bulge region using the Five-hundred-meter Aperture Spherical Telescope (FAST), we discovered 12 pulsar candidates. Notably, four bright pulsar candidates, estimated to be located at distances greater than 3 kpc, are likely situated within the Bulge.Considering the scarcity of known pulsars in this region, the determination of spin and astrometric parameters of these pulsars can be important for us to understand the pulsar population in the Bulge. Such insights are crucial for investigating the origins of Gamma-ray emissions and delineating the electron density distribution within this area. Consequently, we propose to carry out timing observations for three bright candidate pulsars, each boasting a signal-to-noise ratio exceeding 20, including a millisecond pulsar.

银河系核球（Galactic Bulge）内是否存在规模可观的脉冲星（pulsar）种群，尤其是毫秒脉冲星（millisecond pulsars），这一问题长期以来都是学界悬而未决的谜题。近期，我们依托五百米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope, FAST）针对核球区域开展巡天观测，共计发现12颗脉冲星候选体。其中尤为值得关注的是，4颗亮脉冲星候选体的估计距离超过3千秒差距（kpc），极有可能坐落于核球内部。鉴于该区域已知脉冲星数量极为稀少，精准测定这些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内的脉冲星种群分布特征。此类研究成果对于探究伽马射线（Gamma-ray）辐射的起源，以及刻画该区域内的电子密度分布均具有关键意义。据此，我们提议对3颗信噪比（signal-to-noise ratio）均超过20的亮候选脉冲星开展计时观测，其中包含1颗毫秒脉冲星。