Parkes observations for project P1010 semester 2019APRS_06

We propose Parkes NAPA radio observations of PSR B1055-52 to be carried out simultaneously with approved X-ray observations by XMM-Newton. We will look for radio-X-ray correlations in the pulse behavior. In particular, we will search for a correlation of the X-ray pulse intensity with the very unusual quasi-periodic on/off change in the radio pulse intensity. These quasi-periodic changes on short timescale (about 20 periods) are also phase-locked between interpulse and main pulse, indicating global magnetospheric rearrangements. While radio-X-ray correlations have been detected in two older pulsars, they occur on much longer timescales. PSR B1055-52 provides a rare opportunity to search for the short-term manifestations of similar global processes in the radio and X-ray light curves. This radio- and X-ray- bright pulsar also shows some interesting long-term flux variability which we will investigate.

我们提议对脉冲星PSR B1055-52开展帕克斯NAPA射电观测，并与已获批的XMM-牛顿望远镜（XMM-Newton）X射线观测同步进行。我们将在脉冲行为中搜寻射电与X射线的相关性。具体而言，我们将搜寻X射线脉冲强度与射电脉冲强度极不寻常的准周期通断变化之间的相关性。这类发生在短时间尺度（约20个周期）的准周期变化在脉冲间期与主脉冲之间同样存在相位锁定现象，这表明存在全球尺度的磁层重排过程。尽管已在两颗较古老的脉冲星中探测到射电与X射线的相关性，但这类相关性的时间尺度要长得多。脉冲星PSR B1055-52为我们在射电与X射线光变曲线中搜寻类似全球过程的短期表现提供了难得的契机。这颗射电与X射线均明亮的脉冲星同时表现出若干有趣的长期流量变化现象，我们将对此展开研究。