Parkes observations for project P1165 semester 2025APRS_06

We recently discovered two new pulsars J1849+1001 (35.1 ms) and J1839+0542 (57.9 ms) in a FAST pulsar survey at intermediate Galactic latitudes (PT2020_0141). Follow-up timing observations show that they are in circular orbits with massive companions. This suggests that PSR J1849+1001 and J1839+0542 can be classified as the intermediate-mass binary pulsar (IMBP). Their massive companions also make them promising systems to measure "Post-Keplerian" parameters through pulsar timing. These Parkes observations will be combined with regular timing observations with FAST or MeerKAT to measure "Post-Keplerian" parameters and then measure both neutron star and companion masses.

我们近期在FAST望远镜的银道中纬度脉冲星（pulsar）巡天（PT2020_0141）中发现了两颗新脉冲星——J1849+1001（周期35.1毫秒）和J1839+0542（周期57.9毫秒）。后续计时观测（timing observations）表明，它们与大质量伴星处于圆轨道中。这表明PSR J1849+1001和PSR J1839+0542可被归类为中等质量双星脉冲星（intermediate-mass binary pulsar, IMBP）。它们的大质量伴星也使它们成为通过脉冲星计时测量“后开普勒（Post-Keplerian）”参数的理想系统。这些Parkes望远镜观测数据将与FAST或MeerKAT的常规计时观测数据结合，以测量“后开普勒”参数，进而测定中子星及其伴星的质量。