Parkes observations for project P1010 semester 2019APRS_02

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.

我们提议同步开展针对脉冲星PSR B1055-52的帕克斯（Parkes）NAPA射电观测，以及已获批的XMM-牛顿卫星（XMM-Newton）X射线观测任务。我们将探究脉冲行为中的射电-X射线相关性。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性通断变化之间的关联。这类短时标（约20个周期）的准周期性变化在伴脉冲与主脉冲之间还存在相位锁定现象，这表明整体磁层发生了重排。尽管已有两颗较老脉冲星被探测到存在射电-X射线相关性，但这类相关过程的时标要长得多。脉冲星PSR B1055-52为我们提供了难得的契机，得以在射电与X射线光变曲线中探寻类似整体过程的短时标表现。这颗兼具射电与X射线高辐射亮度的脉冲星还存在若干有趣的长期流量变化现象，我们也将对此展开研究。