Parkes observations for project P1207 semester 2024APRS_02

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）内是否存在大量脉冲星（pulsar），尤其是毫秒脉冲星（millisecond pulsar），长期以来都是一大未解之谜。本研究依托500米口径球面射电望远镜（Five-hundred-meter Aperture Spherical Telescope, FAST）对银河系核球区域开展巡天观测，共计发现12颗脉冲星候选体。值得注意的是，其中4颗亮脉冲星候选体的估算距离均超过3千秒差距（kpc），极有可能位于银河系核球内部。鉴于该区域已知脉冲星极为稀缺，对这些候选体的自转参数与天体测量参数进行测定，对于我们理解银河系核球内的脉冲星种群分布至关重要。此类研究结果对于探究伽马射线辐射的起源，以及厘清该区域内的电子密度分布均具有关键意义。据此，本研究计划对3颗信噪比（signal-to-noise ratio）超过20的亮脉冲星候选体开展计时观测，其中包含1颗毫秒脉冲星。