Parkes observations for project P1038 semester 2020APRS_03

PSR~J1759-2402 is one of a small handful of pulsars which are in orbit about high mass stars. Its orbital period is 8.2 years and the orbit is highly eccentric with periastron expected in 2021 January. Although discovered at Parkes, the Lovell telescope has been monitoring the pulsar over many years. However, it's restricted bandwidth and lack of polarization capability make it unsuitable to follow the pulsar as it enters and leaves the eclipse by the companion. In contrast, the UWL on Parkes with its wide-band and excellent polarization characteristics means that we can determine scattering, polarization, dispersion measure and rotation measure changes as the pulsar enters its companion wind. We request weekly observations of the pulsar to track its progress around the orbit.

脉冲星PSR J1759-2402是少数几颗与大质量恒星构成轨道双星系统的脉冲星之一。其轨道周期为8.2年，轨道偏心率极高，预计近星点将在2021年1月到达。尽管该脉冲星最初在帕克斯（Parkes）望远镜中被发现，但洛弗尔（Lovell）望远镜已对其开展了多年监测。然而，洛弗尔望远镜带宽受限且不具备偏振观测能力，无法追踪该脉冲星穿过伴星掩食的全过程。与之形成对比的是，帕克斯望远镜搭载的UWL设备凭借宽频带与优异的偏振观测性能，可让我们测定脉冲星穿过伴星星风时的散射、偏振、色散量（dispersion measure）与旋转量（rotation measure）变化。我们申请对该脉冲星开展每周一次的观测，以追踪其沿轨道运行的完整进程。